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12500152520 = 2353711297481
BaseRepresentation
bin10111010010001000…
…10011000011001000
31012021011020112121212
423221010103003020
5201100014340040
65424213352252
7621523354232
oct135104230310
935234215555
1012500152520
115335012669
12250a338688
13124297116b
14868213252
154d2618d65
hex2e91130c8

12500152520 has 64 divisors (see below), whose sum is σ = 28914937200. Its totient is φ = 4859965440.

The previous prime is 12500152471. The next prime is 12500152523. The reversal of 12500152520 is 2525100521.

It can be written as a sum of positive squares in 8 ways, for example, as 7716216964 + 4783935556 = 87842^2 + 69166^2 .

It is not an unprimeable number, because it can be changed into a prime (12500152523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1667180 + ... + 1674660.

Almost surely, 212500152520 is an apocalyptic number.

12500152520 is a gapful number since it is divisible by the number (10) 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 12500152520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14457468600).

12500152520 is an abundant number, since it is smaller than the sum of its proper divisors (16414784680).

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

12500152520 is a wasteful number, since it uses less digits than its factorization.

12500152520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8658 (or 8654 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The spelling of 12500152520 in words is "twelve billion, five hundred million, one hundred fifty-two thousand, five hundred twenty".

Divisors: 1 2 4 5 8 10 20 37 40 74 148 185 296 370 740 1129 1480 2258 4516 5645 7481 9032 11290 14962 22580 29924 37405 41773 45160 59848 74810 83546 149620 167092 208865 276797 299240 334184 417730 553594 835460 1107188 1383985 1670920 2214376 2767970 5535940 8446049 11071880 16892098 33784196 42230245 67568392 84460490 168920980 312503813 337841960 625007626 1250015252 1562519065 2500030504 3125038130 6250076260 12500152520