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257080508080 = 245113716747279
BaseRepresentation
bin1110111101101100110…
…0010011111010110000
3220120120101022221020021
43233123030103322300
513203000102224310
6314033503253224
724400460156314
oct3573314237260
9816511287207
10257080508080
119a033276820
12419a78aa214
131b31cc72546
14c62ad27b44
156a497375da
hex3bdb313eb0

257080508080 has 160 divisors (see below), whose sum is σ = 673696880640. Its totient is φ = 90410664960.

The previous prime is 257080508057. The next prime is 257080508107. The reversal of 257080508080 is 80805080752.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5413881 + ... + 5461159.

It is an arithmetic number, because the mean of its divisors is an integer number (4210605504).

Almost surely, 2257080508080 is an apocalyptic number.

257080508080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257080508080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336848440320).

257080508080 is an abundant number, since it is smaller than the sum of its proper divisors (416616372560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257080508080 is a wasteful number, since it uses less digits than its factorization.

257080508080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47507 (or 47501 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 257080508080 in words is "two hundred fifty-seven billion, eighty million, five hundred eight thousand, eighty".

Divisors: 1 2 4 5 8 10 11 16 20 22 37 40 44 55 74 80 88 110 148 167 176 185 220 296 334 370 407 440 592 668 740 814 835 880 1336 1480 1628 1670 1837 2035 2672 2960 3256 3340 3674 4070 6179 6512 6680 7348 8140 9185 12358 13360 14696 16280 18370 24716 29392 30895 32560 36740 47279 49432 61790 67969 73480 94558 98864 123580 135938 146960 189116 236395 247160 271876 339845 378232 472790 494320 520069 543752 679690 756464 945580 1040138 1087504 1359380 1749323 1891160 2080276 2600345 2718760 3498646 3782320 4160552 5200690 5437520 6997292 7895593 8321104 8746615 10401380 13994584 15791186 17493230 19242553 20802760 27989168 31582372 34986460 38485106 39477965 41605520 63164744 69972920 76970212 78955930 86851523 96212765 126329488 139945840 153940424 157911860 173703046 192425530 292136941 307880848 315823720 347406092 384851060 434257615 584273882 631647440 694812184 769702120 868515230 1168547764 1389624368 1460684705 1539404240 1737030460 2337095528 2921369410 3213506351 3474060920 4674191056 5842738820 6427012702 6948121840 11685477640 12854025404 16067531755 23370955280 25708050808 32135063510 51416101616 64270127020 128540254040 257080508080