391266068872 has 128 divisors (see below), whose sum is σ = 879481405440. Its totient is φ = 159696956160.

The previous prime is 391266068857. The next prime is 391266068917. The reversal of 391266068872 is 278860662193.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30664318 + ... + 30677074.

It is an arithmetic number, because the mean of its divisors is an integer number (6870948480).

Almost surely, 2^391266068872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391266068872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439740702720).

391266068872 is an abundant number, since it is smaller than the sum of its proper divisors (488215336568).

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

391266068872 is a wasteful number, since it uses less digits than its factorization.

391266068872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13131 (or 13127 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 391266068872 in words is "three hundred ninety-one billion, two hundred sixty-six million, sixty-eight thousand, eight hundred seventy-two".