556631091 has 12 divisors (see below), whose sum is σ = 804648520. Its totient is φ = 370798560.

The previous prime is 556631083. The next prime is 556631093. The reversal of 556631091 is 190136655.

556631091 is a `hidden beast` number, since 5 + 566 + 3 + 1 + 0 + 91 = 666.

It is not a de Polignac number, because 556631091 - 2³ = 556631083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556631093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11521 + ... + 35298.

Almost surely, 2^556631091 is an apocalyptic number.

556631091 is a deficient number, since it is larger than the sum of its proper divisors (248017429).

556631091 is a wasteful number, since it uses less digits than its factorization.

556631091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48146 (or 48143 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 556631091 is about 23593.0305598920. The cubic root of 556631091 is about 822.6008491684.

The spelling of 556631091 in words is "five hundred fifty-six million, six hundred thirty-one thousand, ninety-one".