12505132865872 has 20 divisors (see below), whose sum is σ = 24229642117716. Its totient is φ = 6252321996800.

The previous prime is 12505132865851. The next prime is 12505132865909. The reversal of 12505132865872 is 27856823150521.

It can be written as a sum of positive squares in 2 ways, for example, as 9314679584016 + 3190453281856 = 3051996^2 + 1786184^2 .

It is a super-2 number, since 2×12505132865872² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14854843 + ... + 15674074.

Almost surely, 2^{12505132865872} is an apocalyptic number.

It is an amenable number.

12505132865872 is a deficient number, since it is larger than the sum of its proper divisors (11724509251844).

12505132865872 is a wasteful number, since it uses less digits than its factorization.

12505132865872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30554526 (or 30554520 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 55.

The spelling of 12505132865872 in words is "twelve trillion, five hundred five billion, one hundred thirty-two million, eight hundred sixty-five thousand, eight hundred seventy-two".