656375034920 has 128 divisors (see below), whose sum is σ = 1619390240640. Its totient is φ = 237457059840.

The previous prime is 656375034901. The next prime is 656375034937. The reversal of 656375034920 is 29430573656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75328484 + ... + 75337196.

It is an arithmetic number, because the mean of its divisors is an integer number (12651486255).

Almost surely, 2^656375034920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656375034920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809695120320).

656375034920 is an abundant number, since it is smaller than the sum of its proper divisors (963015205720).

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

656375034920 is a wasteful number, since it uses less digits than its factorization.

656375034920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9595 (or 9591 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 50.

The spelling of 656375034920 in words is "six hundred fifty-six billion, three hundred seventy-five million, thirty-four thousand, nine hundred twenty".