655645880 has 16 divisors (see below), whose sum is σ = 1475203320. Its totient is φ = 262258336.

The previous prime is 655645849. The next prime is 655645909. The reversal of 655645880 is 88546556.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8195534 + ... + 8195613.

Almost surely, 2^655645880 is an apocalyptic number.

It is an amenable number.

655645880 is an abundant number, since it is smaller than the sum of its proper divisors (819557440).

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

655645880 is a wasteful number, since it uses less digits than its factorization.

655645880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16391158 (or 16391154 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 47.

The square root of 655645880 is about 25605.5829849664. The cubic root of 655645880 is about 868.7399206601.

The spelling of 655645880 in words is "six hundred fifty-five million, six hundred forty-five thousand, eight hundred eighty".