396656189217 has 16 divisors (see below), whose sum is σ = 588365208000. Its totient is φ = 264110575392.

The previous prime is 396656189197. The next prime is 396656189273. The reversal of 396656189217 is 712981656693.

396656189217 is a `hidden beast` number, since 3 + 9 + 6 + 6 + 5 + 618 + 9 + 2 + 1 + 7 = 666.

It is not a de Polignac number, because 396656189217 - 2²⁰ = 396655140641 is a prime.

It is a super-2 number, since 2×396656189217² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (396656189717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9057867 + ... + 9101552.

It is an arithmetic number, because the mean of its divisors is an integer number (36772825500).

Almost surely, 2^396656189217 is an apocalyptic number.

It is an amenable number.

396656189217 is a deficient number, since it is larger than the sum of its proper divisors (191709018783).

396656189217 is a wasteful number, since it uses less digits than its factorization.

396656189217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18160237 (or 18160231 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 396656189217 in words is "three hundred ninety-six billion, six hundred fifty-six million, one hundred eighty-nine thousand, two hundred seventeen".