655881327852864 has 56 divisors (see below), whose sum is σ = 1742105025133248. Its totient is φ = 217776420126720.

The previous prime is 655881327852853. The next prime is 655881327852871. The reversal of 655881327852864 is 468258723188556.

It is a self number, because there is not a number n which added to its sum of digits gives 655881327852864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6645959572 + ... + 6646058259.

Almost surely, 2^{655881327852864} is an apocalyptic number.

655881327852864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

655881327852864 is an abundant number, since it is smaller than the sum of its proper divisors (1086223697280384).

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

655881327852864 is a wasteful number, since it uses less digits than its factorization.

655881327852864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13292018103 (or 13292018093 counting only the distinct ones).

The product of its digits is 6193152000, while the sum is 78.

The spelling of 655881327852864 in words is "six hundred fifty-five trillion, eight hundred eighty-one billion, three hundred twenty-seven million, eight hundred fifty-two thousand, eight hundred sixty-four".