561523894 has 16 divisors (see below), whose sum is σ = 877161600. Its totient is φ = 269297280.

The previous prime is 561523883. The next prime is 561523913. The reversal of 561523894 is 498325165.

It is a self number, because there is not a number n which added to its sum of digits gives 561523894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33069 + ... + 47080.

It is an arithmetic number, because the mean of its divisors is an integer number (54822600).

Almost surely, 2^561523894 is an apocalyptic number.

561523894 is a deficient number, since it is larger than the sum of its proper divisors (315637706).

561523894 is a wasteful number, since it uses less digits than its factorization.

561523894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80295.

The product of its digits is 259200, while the sum is 43.

The square root of 561523894 is about 23696.4953948891. The cubic root of 561523894 is about 825.0040496893.

The spelling of 561523894 in words is "five hundred sixty-one million, five hundred twenty-three thousand, eight hundred ninety-four".