15901992906 has 16 divisors (see below), whose sum is σ = 32404061664. Its totient is φ = 5200651664.

The previous prime is 15901992889. The next prime is 15901992937. The reversal of 15901992906 is 60929910951.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25002816 + ... + 25003451.

It is an arithmetic number, because the mean of its divisors is an integer number (2025253854).

Almost surely, 2^15901992906 is an apocalyptic number.

15901992906 is an abundant number, since it is smaller than the sum of its proper divisors (16502068758).

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

15901992906 is a wasteful number, since it uses less digits than its factorization.

15901992906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50006325.

The product of its (nonzero) digits is 393660, while the sum is 51.

The spelling of 15901992906 in words is "fifteen billion, nine hundred one million, nine hundred ninety-two thousand, nine hundred six".