12521731044768 has 96 divisors (see below), whose sum is σ = 35952296808960. Its totient is φ = 3784452053760.

The previous prime is 12521731044721. The next prime is 12521731044793. The reversal of 12521731044768 is 86744013712521.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 12521731044768.

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, 15243180 + ... + 16043627.

It is an arithmetic number, because the mean of its divisors is an integer number (374503091760).

Almost surely, 2^{12521731044768} is an apocalyptic number.

It is an amenable number.

12521731044768 is an abundant number, since it is smaller than the sum of its proper divisors (23430565764192).

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

12521731044768 is a wasteful number, since it uses less digits than its factorization.

12521731044768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31287210 (or 31287202 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 12521731044768 in words is "twelve trillion, five hundred twenty-one billion, seven hundred thirty-one million, forty-four thousand, seven hundred sixty-eight".