391677760868 has 12 divisors (see below), whose sum is σ = 685498318512. Its totient is φ = 195821098440.

The previous prime is 391677760823. The next prime is 391677760871. The reversal of 391677760868 is 868067776193.

It is a super-2 number, since 2×391677760868² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 391677760798 and 391677760807.

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, 4395878 + ... + 4484093.

It is an arithmetic number, because the mean of its divisors is an integer number (57124859876).

Almost surely, 2^391677760868 is an apocalyptic number.

It is an amenable number.

391677760868 is a deficient number, since it is larger than the sum of its proper divisors (293820557644).

391677760868 is a wasteful number, since it uses less digits than its factorization.

391677760868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8891002 (or 8891000 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 68.

The spelling of 391677760868 in words is "three hundred ninety-one billion, six hundred seventy-seven million, seven hundred sixty thousand, eight hundred sixty-eight".