656344520544 has 24 divisors (see below), whose sum is σ = 1722904366680. Its totient is φ = 218781506816.

The previous prime is 656344520501. The next prime is 656344520591. The reversal of 656344520544 is 445025443656.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 656344520493 and 656344520502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3418460949 + ... + 3418461140.

It is an arithmetic number, because the mean of its divisors is an integer number (71787681945).

Almost surely, 2^656344520544 is an apocalyptic number.

It is an amenable number.

656344520544 is an abundant number, since it is smaller than the sum of its proper divisors (1066559846136).

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

656344520544 is a wasteful number, since it uses less digits than its factorization.

656344520544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6836922102 (or 6836922094 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 48.

The spelling of 656344520544 in words is "six hundred fifty-six billion, three hundred forty-four million, five hundred twenty thousand, five hundred forty-four".