391496481792 has 704 divisors, whose sum is σ = 1298881436160. Its totient is φ = 115712851968.

The previous prime is 391496481773. The next prime is 391496481797. The reversal of 391496481792 is 297184694193.

391496481792 is a `hidden beast` number, since 3 + 9 + 1 + 496 + 48 + 17 + 92 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391496481797) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1128231763 + ... + 1128232109.

It is an arithmetic number, because the mean of its divisors is an integer number (1845002040).

Almost surely, 2^391496481792 is an apocalyptic number.

391496481792 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391496481792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649440718080).

391496481792 is an abundant number, since it is smaller than the sum of its proper divisors (907384954368).

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

391496481792 is a wasteful number, since it uses less digits than its factorization.

391496481792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 481 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 391496481792 in words is "three hundred ninety-one billion, four hundred ninety-six million, four hundred eighty-one thousand, seven hundred ninety-two".