656400311656 has 16 divisors (see below), whose sum is σ = 1295526931200. Its totient is φ = 310926463344.

The previous prime is 656400311653. The next prime is 656400311711. The reversal of 656400311656 is 656113004656.

It is a super-2 number, since 2×656400311656² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (656400311653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2159211400 + ... + 2159211703.

It is an arithmetic number, because the mean of its divisors is an integer number (80970433200).

Almost surely, 2^656400311656 is an apocalyptic number.

It is an amenable number.

656400311656 is a deficient number, since it is larger than the sum of its proper divisors (639126619544).

656400311656 is a wasteful number, since it uses less digits than its factorization.

656400311656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318423128 (or 4318423124 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 656400311656 in words is "six hundred fifty-six billion, four hundred million, three hundred eleven thousand, six hundred fifty-six".