11939517992 has 16 divisors (see below), whose sum is σ = 22391510100. Its totient is φ = 5968448640.

The previous prime is 11939517973. The next prime is 11939518001. The reversal of 11939517992 is 29971593911.

It can be written as a sum of positive squares in 2 ways, for example, as 11192370436 + 747147556 = 105794^2 + 27334^2 .

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, 124517 + ... + 198452.

Almost surely, 2^11939517992 is an apocalyptic number.

It is an amenable number.

11939517992 is a deficient number, since it is larger than the sum of its proper divisors (10451992108).

11939517992 is a wasteful number, since it uses less digits than its factorization.

11939517992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327596 (or 327592 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 56.

The spelling of 11939517992 in words is "eleven billion, nine hundred thirty-nine million, five hundred seventeen thousand, nine hundred ninety-two".