655379639256 has 128 divisors (see below), whose sum is σ = 1749067084800. Its totient is φ = 204046254720.

The previous prime is 655379639231. The next prime is 655379639267. The reversal of 655379639256 is 652936973556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18565735 + ... + 18601001.

It is an arithmetic number, because the mean of its divisors is an integer number (13664586600).

Almost surely, 2^655379639256 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 655379639256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874533542400).

655379639256 is an abundant number, since it is smaller than the sum of its proper divisors (1093687445544).

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

655379639256 is a wasteful number, since it uses less digits than its factorization.

655379639256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35869 (or 35865 counting only the distinct ones).

The product of its digits is 275562000, while the sum is 66.

The spelling of 655379639256 in words is "six hundred fifty-five billion, three hundred seventy-nine million, six hundred thirty-nine thousand, two hundred fifty-six".