15880402871864 has 64 divisors (see below), whose sum is σ = 30256333380000. Its totient is φ = 7812593510400.

The previous prime is 15880402871819. The next prime is 15880402871869. The reversal of 15880402871864 is 46817820408851.

It is a happy number.

15880402871864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15880402871797 and 15880402871806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15880402871869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429425327 + ... + 429462305.

Almost surely, 2^{15880402871864} is an apocalyptic number.

It is an amenable number.

15880402871864 is a deficient number, since it is larger than the sum of its proper divisors (14375930508136).

15880402871864 is a wasteful number, since it uses less digits than its factorization.

15880402871864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38808 (or 38804 counting only the distinct ones).

The product of its (nonzero) digits is 27525120, while the sum is 62.

The spelling of 15880402871864 in words is "fifteen trillion, eight hundred eighty billion, four hundred two million, eight hundred seventy-one thousand, eight hundred sixty-four".