656188651616 has 48 divisors (see below), whose sum is σ = 1372532654304. Its totient is φ = 307740678144.

The previous prime is 656188651603. The next prime is 656188651649. The reversal of 656188651616 is 616156881656.

It is a super-2 number, since 2×656188651616² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1899020 + ... + 2217803.

It is an arithmetic number, because the mean of its divisors is an integer number (28594430298).

Almost surely, 2^656188651616 is an apocalyptic number.

It is an amenable number.

656188651616 is an abundant number, since it is smaller than the sum of its proper divisors (716344002688).

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

656188651616 is a wasteful number, since it uses less digits than its factorization.

656188651616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117143 (or 4117135 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 59.

The spelling of 656188651616 in words is "six hundred fifty-six billion, one hundred eighty-eight million, six hundred fifty-one thousand, six hundred sixteen".