655980188490 has 96 divisors (see below), whose sum is σ = 1860813594432. Its totient is φ = 159007104000.

The previous prime is 655980188473. The next prime is 655980188519. The reversal of 655980188490 is 94881089556.

655980188490 is a `hidden beast` number, since 6 + 5 + 59 + 80 + 18 + 8 + 490 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9798330 + ... + 9865050.

It is an arithmetic number, because the mean of its divisors is an integer number (19383474942).

Almost surely, 2^655980188490 is an apocalyptic number.

655980188490 is an abundant number, since it is smaller than the sum of its proper divisors (1204833405942).

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

655980188490 is a wasteful number, since it uses less digits than its factorization.

655980188490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76676 (or 76673 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 63.

The spelling of 655980188490 in words is "six hundred fifty-five billion, nine hundred eighty million, one hundred eighty-eight thousand, four hundred ninety".