391939156104 has 64 divisors (see below), whose sum is σ = 1021470497280. Its totient is φ = 125180160000.

The previous prime is 391939156097. The next prime is 391939156123. The reversal of 391939156104 is 401651939193.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2532777 + ... + 2683064.

It is an arithmetic number, because the mean of its divisors is an integer number (15960476520).

Almost surely, 2^391939156104 is an apocalyptic number.

It is an amenable number.

391939156104 is an abundant number, since it is smaller than the sum of its proper divisors (629531341176).

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

391939156104 is a wasteful number, since it uses less digits than its factorization.

391939156104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215982 (or 5215978 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 51.

The spelling of 391939156104 in words is "three hundred ninety-one billion, nine hundred thirty-nine million, one hundred fifty-six thousand, one hundred four".