656201623064 has 16 divisors (see below), whose sum is σ = 1325022508320. Its totient is φ = 302862287520.

The previous prime is 656201623057. The next prime is 656201623079. The reversal of 656201623064 is 460326102656.

It is a happy number.

It is a super-2 number, since 2×656201623064² (a number of 24 digits) contains 22 as substring.

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, 3154815392 + ... + 3154815599.

It is an arithmetic number, because the mean of its divisors is an integer number (82813906770).

Almost surely, 2^656201623064 is an apocalyptic number.

It is an amenable number.

656201623064 is an abundant number, since it is smaller than the sum of its proper divisors (668820885256).

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

656201623064 is a wasteful number, since it uses less digits than its factorization.

656201623064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6309631010 (or 6309631006 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 656201623064 in words is "six hundred fifty-six billion, two hundred one million, six hundred twenty-three thousand, sixty-four".