396351797894991 has 32 divisors (see below), whose sum is σ = 591787464549120. Its totient is φ = 262172650420512.

The previous prime is 396351797894971. The next prime is 396351797894993. The reversal of 396351797894991 is 199498797153693.

396351797894991 is a `hidden beast` number, since 3 + 9 + 6 + 3 + 517 + 9 + 7 + 89 + 4 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 396351797894991 - 2¹⁴ = 396351797878607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396351797894993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108559605 + ... + 112151198.

It is an arithmetic number, because the mean of its divisors is an integer number (18493358267160).

Almost surely, 2^{396351797894991} is an apocalyptic number.

396351797894991 is a deficient number, since it is larger than the sum of its proper divisors (195435666654129).

396351797894991 is a wasteful number, since it uses less digits than its factorization.

396351797894991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220711332 (or 220711326 counting only the distinct ones).

The product of its digits is 24998984640, while the sum is 90.

The spelling of 396351797894991 in words is "three hundred ninety-six trillion, three hundred fifty-one billion, seven hundred ninety-seven million, eight hundred ninety-four thousand, nine hundred ninety-one".