15871572988 has 6 divisors (see below), whose sum is σ = 27775252736. Its totient is φ = 7935786492.

The previous prime is 15871572971. The next prime is 15871572989. The reversal of 15871572988 is 88927517851.

It is a super-2 number, since 2×15871572988² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15871572989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983946620 + ... + 1983946627.

Almost surely, 2^15871572988 is an apocalyptic number.

It is an amenable number.

15871572988 is a deficient number, since it is larger than the sum of its proper divisors (11903679748).

15871572988 is a wasteful number, since it uses less digits than its factorization.

15871572988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967893251 (or 3967893249 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 61.

The spelling of 15871572988 in words is "fifteen billion, eight hundred seventy-one million, five hundred seventy-two thousand, nine hundred eighty-eight".