655673587308864 has 84 divisors (see below), whose sum is σ = 1879485782496660. Its totient is φ = 218544392202240.

The previous prime is 655673587308829. The next prime is 655673587308893. The reversal of 655673587308864 is 468803785376556.

655673587308864 is a `hidden beast` number, since 6 + 5 + 5 + 67 + 358 + 73 + 0 + 88 + 64 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 647825072998464 + 7848514310400 = 25452408^2 + 2801520^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25722717 + ... + 44418524.

Almost surely, 2^{655673587308864} is an apocalyptic number.

655673587308864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

655673587308864 is an abundant number, since it is smaller than the sum of its proper divisors (1223812195187796).

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

655673587308864 is a wasteful number, since it uses less digits than its factorization.

655673587308864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70157488 (or 70157475 counting only the distinct ones).

The product of its (nonzero) digits is 24385536000, while the sum is 81.

The spelling of 655673587308864 in words is "six hundred fifty-five trillion, six hundred seventy-three billion, five hundred eighty-seven million, three hundred eight thousand, eight hundred sixty-four".