391857034416 has 20 divisors (see below), whose sum is σ = 1012297339032. Its totient is φ = 130619011456.

The previous prime is 391857034397. The next prime is 391857034421. The reversal of 391857034416 is 614430758193.

It is a super-2 number, since 2×391857034416² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4081844061 + ... + 4081844156.

Almost surely, 2^391857034416 is an apocalyptic number.

It is an amenable number.

391857034416 is an abundant number, since it is smaller than the sum of its proper divisors (620440304616).

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

391857034416 is a wasteful number, since it uses less digits than its factorization.

391857034416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8163688228 (or 8163688222 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 391857034416 in words is "three hundred ninety-one billion, eight hundred fifty-seven million, thirty-four thousand, four hundred sixteen".