656211118398 has 32 divisors (see below), whose sum is σ = 1455204396672. Its totient is φ = 195591986400.

The previous prime is 656211118397. The next prime is 656211118403. The reversal of 656211118398 is 893811112656.

It is a super-2 number, since 2×656211118398² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 656211118398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656211118397) 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, 81492636 + ... + 81500687.

It is an arithmetic number, because the mean of its divisors is an integer number (45475137396).

Almost surely, 2^656211118398 is an apocalyptic number.

656211118398 is an abundant number, since it is smaller than the sum of its proper divisors (798993278274).

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

656211118398 is a wasteful number, since it uses less digits than its factorization.

656211118398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162993400.

The product of its digits is 622080, while the sum is 51.

The spelling of 656211118398 in words is "six hundred fifty-six billion, two hundred eleven million, one hundred eighteen thousand, three hundred ninety-eight".