655405644 has 24 divisors (see below), whose sum is σ = 1530511360. Its totient is φ = 218292624.

The previous prime is 655405633. The next prime is 655405649. The reversal of 655405644 is 446504556.

It is not an unprimeable number, because it can be changed into a prime (655405649) 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, 6004 + ... + 36699.

Almost surely, 2^655405644 is an apocalyptic number.

It is an amenable number.

655405644 is an abundant number, since it is smaller than the sum of its proper divisors (875105716).

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

655405644 is a wasteful number, since it uses less digits than its factorization.

655405644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43989 (or 43987 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The square root of 655405644 is about 25600.8914688532. The cubic root of 655405644 is about 868.6338023497.

The spelling of 655405644 in words is "six hundred fifty-five million, four hundred five thousand, six hundred forty-four".