561508893 has 12 divisors (see below), whose sum is σ = 884802048. Its totient is φ = 340308360.

The previous prime is 561508889. The next prime is 561508901. The reversal of 561508893 is 398805165.

561508893 is a `hidden beast` number, since 5 + 61 + 508 + 89 + 3 = 666.

It is not a de Polignac number, because 561508893 - 2² = 561508889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561508873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2835805 + ... + 2836002.

It is an arithmetic number, because the mean of its divisors is an integer number (73733504).

Almost surely, 2^561508893 is an apocalyptic number.

It is an amenable number.

561508893 is a deficient number, since it is larger than the sum of its proper divisors (323293155).

561508893 is a wasteful number, since it uses less digits than its factorization.

561508893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5671824 (or 5671821 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 561508893 is about 23696.1788691764. The cubic root of 561508893 is about 824.9967030171.

The spelling of 561508893 in words is "five hundred sixty-one million, five hundred eight thousand, eight hundred ninety-three".