39461979968 has 28 divisors (see below), whose sum is σ = 78327389700. Its totient is φ = 19725944832.

The previous prime is 39461979919. The next prime is 39461980013. The reversal of 39461979968 is 86997916493.

It can be written as a sum of positive squares in 2 ways, for example, as 28388206144 + 11073773824 = 168488^2 + 105232^2 .

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, 180008 + ... + 333656.

It is an arithmetic number, because the mean of its divisors is an integer number (2797406775).

Almost surely, 2^39461979968 is an apocalyptic number.

It is an amenable number.

39461979968 is a deficient number, since it is larger than the sum of its proper divisors (38865409732).

39461979968 is a wasteful number, since it uses less digits than its factorization.

39461979968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157674 (or 157664 counting only the distinct ones).

The product of its digits is 158723712, while the sum is 71.

The spelling of 39461979968 in words is "thirty-nine billion, four hundred sixty-one million, nine hundred seventy-nine thousand, nine hundred sixty-eight".