391032864768 has 352 divisors, whose sum is σ = 1285268656896. Its totient is φ = 102978551808.

The previous prime is 391032864763. The next prime is 391032864773. The reversal of 391032864768 is 867468230193.

It is an interprime number because it is at equal distance from previous prime (391032864763) and next prime (391032864773).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391032864763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572522155 + ... + 572522837.

Almost surely, 2^391032864768 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 391032864768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642634328448).

391032864768 is an abundant number, since it is smaller than the sum of its proper divisors (894235792128).

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

391032864768 is an frugal number, since it uses more digits than its factorization.

391032864768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 391032864768 in words is "three hundred ninety-one billion, thirty-two million, eight hundred sixty-four thousand, seven hundred sixty-eight".