15135868512 has 72 divisors (see below), whose sum is σ = 43748293680. Its totient is φ = 4962574080.

The previous prime is 15135868493. The next prime is 15135868547. The reversal of 15135868512 is 21586853151.

15135868512 is a `hidden beast` number, since 1 + 5 + 13 + 586 + 8 + 51 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×15135868512³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 413212 + ... + 448347.

It is an arithmetic number, because the mean of its divisors is an integer number (607615190).

Almost surely, 2^15135868512 is an apocalyptic number.

15135868512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15135868512 is an abundant number, since it is smaller than the sum of its proper divisors (28612425168).

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

15135868512 is a wasteful number, since it uses less digits than its factorization.

15135868512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861636 (or 861625 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The spelling of 15135868512 in words is "fifteen billion, one hundred thirty-five million, eight hundred sixty-eight thousand, five hundred twelve".