505656630 has 48 divisors (see below), whose sum is σ = 1319061744. Its totient is φ = 134395200.

The previous prime is 505656611. The next prime is 505656659. The reversal of 505656630 is 36656505.

It is a happy number.

505656630 is a `hidden beast` number, since 5 + 0 + 565 + 66 + 30 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18480 + ... + 36780.

It is an arithmetic number, because the mean of its divisors is an integer number (27480453).

Almost surely, 2^505656630 is an apocalyptic number.

505656630 is an abundant number, since it is smaller than the sum of its proper divisors (813405114).

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

505656630 is a wasteful number, since it uses less digits than its factorization.

505656630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18621 (or 18618 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 505656630 is about 22486.8101339430. The cubic root of 505656630 is about 796.6824225763.

The spelling of 505656630 in words is "five hundred five million, six hundred fifty-six thousand, six hundred thirty".