655664572644 has 24 divisors (see below), whose sum is σ = 1538727267840. Its totient is φ = 217291533984.

The previous prime is 655664572643. The next prime is 655664572691. The reversal of 655664572644 is 446275466556.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (655664572643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157913284 + ... + 157917435.

It is an arithmetic number, because the mean of its divisors is an integer number (64113636160).

Almost surely, 2^655664572644 is an apocalyptic number.

It is an amenable number.

655664572644 is an abundant number, since it is smaller than the sum of its proper divisors (883062695196).

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

655664572644 is a wasteful number, since it uses less digits than its factorization.

655664572644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315830899 (or 315830897 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 60.

The spelling of 655664572644 in words is "six hundred fifty-five billion, six hundred sixty-four million, five hundred seventy-two thousand, six hundred forty-four".