391266068860 has 12 divisors (see below), whose sum is σ = 821658744648. Its totient is φ = 156506427536.

The previous prime is 391266068857. The next prime is 391266068917. The reversal of 391266068860 is 68860662193.

It is a happy number.

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, 9781651702 + ... + 9781651741.

It is an arithmetic number, because the mean of its divisors is an integer number (68471562054).

Almost surely, 2^391266068860 is an apocalyptic number.

It is an amenable number.

391266068860 is an abundant number, since it is smaller than the sum of its proper divisors (430392675788).

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

391266068860 is a wasteful number, since it uses less digits than its factorization.

391266068860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19563303452 (or 19563303450 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 391266068860 in words is "three hundred ninety-one billion, two hundred sixty-six million, sixty-eight thousand, eight hundred sixty".