396640137663 has 192 divisors, whose sum is σ = 758732083200. Its totient is φ = 205267154400.

The previous prime is 396640137653. The next prime is 396640137697. The reversal of 396640137663 is 366731046693.

396640137663 is a `hidden beast` number, since 396 + 64 + 0 + 137 + 6 + 63 = 666.

It is not a de Polignac number, because 396640137663 - 2⁶ = 396640137599 is a prime.

It is a super-2 number, since 2×396640137663² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396640137613) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 303473056 + ... + 303474362.

It is an arithmetic number, because the mean of its divisors is an integer number (3951729600).

Almost surely, 2^396640137663 is an apocalyptic number.

396640137663 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

396640137663 is a deficient number, since it is larger than the sum of its proper divisors (362091945537).

396640137663 is a wasteful number, since it uses less digits than its factorization.

396640137663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 54.

The spelling of 396640137663 in words is "three hundred ninety-six billion, six hundred forty million, one hundred thirty-seven thousand, six hundred sixty-three".