655994564 has 6 divisors (see below), whose sum is σ = 1147990494. Its totient is φ = 327997280.

The previous prime is 655994561. The next prime is 655994611. The reversal of 655994564 is 465499556.

655994564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 366722500 + 289272064 = 19150^2 + 17008^2 .

It is not an unprimeable number, because it can be changed into a prime (655994561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81999317 + ... + 81999324.

It is an arithmetic number, because the mean of its divisors is an integer number (191331749).

Almost surely, 2^655994564 is an apocalyptic number.

It is an amenable number.

655994564 is a deficient number, since it is larger than the sum of its proper divisors (491995930).

655994564 is a wasteful number, since it uses less digits than its factorization.

655994564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163998645 (or 163998643 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 53.

The square root of 655994564 is about 25612.3908294403. The cubic root of 655994564 is about 868.8938970860.

The spelling of 655994564 in words is "six hundred fifty-five million, nine hundred ninety-four thousand, five hundred sixty-four".