561684627 has 48 divisors (see below), whose sum is σ = 940972032. Its totient is φ = 316249920.

The previous prime is 561684601. The next prime is 561684649. The reversal of 561684627 is 726486165.

561684627 is a `hidden beast` number, since 5 + 6 + 16 + 8 + 4 + 627 = 666.

It is not a de Polignac number, because 561684627 - 2⁸ = 561684371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561684667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2072502 + ... + 2072772.

It is an arithmetic number, because the mean of its divisors is an integer number (19603584).

Almost surely, 2^561684627 is an apocalyptic number.

561684627 is a deficient number, since it is larger than the sum of its proper divisors (379287405).

561684627 is a wasteful number, since it uses less digits than its factorization.

561684627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 645 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 561684627 is about 23699.8866452985. The cubic root of 561684627 is about 825.0827597418.

The spelling of 561684627 in words is "five hundred sixty-one million, six hundred eighty-four thousand, six hundred twenty-seven".