656123416624 has 80 divisors (see below), whose sum is σ = 1436356789504. Its totient is φ = 288253209600.

The previous prime is 656123416591. The next prime is 656123416639. The reversal of 656123416624 is 426614321656.

It is a super-3 number, since 3×656123416624³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440739 + ... + 1227394.

Almost surely, 2^656123416624 is an apocalyptic number.

It is an amenable number.

656123416624 is an abundant number, since it is smaller than the sum of its proper divisors (780233372880).

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

656123416624 is a wasteful number, since it uses less digits than its factorization.

656123416624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668246 (or 1668240 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 46.

The spelling of 656123416624 in words is "six hundred fifty-six billion, one hundred twenty-three million, four hundred sixteen thousand, six hundred twenty-four".