391881413056 has 112 divisors (see below), whose sum is σ = 894563811072. Its totient is φ = 166850611200.

The previous prime is 391881413047. The next prime is 391881413137. The reversal of 391881413056 is 650314188193.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

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, 43678651 + ... + 43687621.

Almost surely, 2^391881413056 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 391881413056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447281905536).

391881413056 is an abundant number, since it is smaller than the sum of its proper divisors (502682398016).

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

391881413056 is a wasteful number, since it uses less digits than its factorization.

391881413056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9618 (or 9608 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 391881413056 in words is "three hundred ninety-one billion, eight hundred eighty-one million, four hundred thirteen thousand, fifty-six".