15531130725968 has 80 divisors (see below), whose sum is σ = 35354996885376. Its totient is φ = 6516066577920.

The previous prime is 15531130725919. The next prime is 15531130725973. The reversal of 15531130725968 is 86952703113551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30897221 + ... + 31395867.

Almost surely, 2^{15531130725968} is an apocalyptic number.

It is an amenable number.

15531130725968 is an abundant number, since it is smaller than the sum of its proper divisors (19823866159408).

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

15531130725968 is a wasteful number, since it uses less digits than its factorization.

15531130725968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512292 (or 512286 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 56.

The spelling of 15531130725968 in words is "fifteen trillion, five hundred thirty-one billion, one hundred thirty million, seven hundred twenty-five thousand, nine hundred sixty-eight".