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68901308080 = 24511263297707
BaseRepresentation
bin100000000101011010…
…1101000011010110000
320120211211222002220021
41000022311220122300
52112102213324310
651353002053224
74656303312133
oct1001265503260
9216754862807
1068901308080
1127247aa0620
121142aaaa214
1366609341a7
143498b3821a
151bd3e375da
hex100ad686b0

68901308080 has 80 divisors (see below), whose sum is σ = 175423843584. Its totient is φ = 24959671040.

The previous prime is 68901308059. The next prime is 68901308123. The reversal of 68901308080 is 8080310986.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82587 + ... + 380293.

Almost surely, 268901308080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68901308080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87711921792).

68901308080 is an abundant number, since it is smaller than the sum of its proper divisors (106522535504).

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

68901308080 is a wasteful number, since it uses less digits than its factorization.

68901308080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297994 (or 297988 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 68901308080 in words is "sixty-eight billion, nine hundred one million, three hundred eight thousand, eighty".

Divisors: 1 2 4 5 8 10 11 16 20 22 40 44 55 80 88 110 176 220 263 440 526 880 1052 1315 2104 2630 2893 4208 5260 5786 10520 11572 14465 21040 23144 28930 46288 57860 115720 231440 297707 595414 1190828 1488535 2381656 2977070 3274777 4763312 5954140 6549554 11908280 13099108 16373885 23816560 26198216 32747770 52396432 65495540 78296941 130991080 156593882 261982160 313187764 391484705 626375528 782969410 861266351 1252751056 1565938820 1722532702 3131877640 3445065404 4306331755 6263755280 6890130808 8612663510 13780261616 17225327020 34450654040 68901308080