656214420620 has 48 divisors (see below), whose sum is σ = 1512017424288. Its totient is φ = 237244085760.

The previous prime is 656214420619. The next prime is 656214420649. The reversal of 656214420620 is 26024412656.

It is an unprimeable number.

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, 8582729 + ... + 8658848.

It is an arithmetic number, because the mean of its divisors is an integer number (31500363006).

Almost surely, 2^656214420620 is an apocalyptic number.

It is an amenable number.

656214420620 is an abundant number, since it is smaller than the sum of its proper divisors (855803003668).

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

656214420620 is a wasteful number, since it uses less digits than its factorization.

656214420620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17241770 (or 17241768 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 656214420620 in words is "six hundred fifty-six billion, two hundred fourteen million, four hundred twenty thousand, six hundred twenty".