396658116864 has 81 divisors (see below), whose sum is σ = 1143750307609. Its totient is φ = 132209295360.

The previous prime is 396658116853. The next prime is 396658116887. The reversal of 396658116864 is 468611856693.

The square root of 396658116864 is 629808.

It is a perfect power (a square), and thus also a powerful number.

396658116864 is a `hidden beast` number, since 39 + 6 + 6 + 581 + 16 + 8 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55975774464 + 340682342400 = 236592^2 + 583680^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30224224 + ... + 30237344.

Almost surely, 2^396658116864 is an apocalyptic number.

396658116864 is the 629808-th square number.

It is an amenable number.

396658116864 is an abundant number, since it is smaller than the sum of its proper divisors (747092190745).

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

396658116864 is an frugal number, since it uses more digits than its factorization.

396658116864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26264 (or 13126 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 396658116864 in words is "three hundred ninety-six billion, six hundred fifty-eight million, one hundred sixteen thousand, eight hundred sixty-four".