561994374 has 32 divisors (see below), whose sum is σ = 1180373760. Its totient is φ = 178038432.

The previous prime is 561994373. The next prime is 561994417. The reversal of 561994374 is 473499165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561994373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8697 + ... + 34635.

It is an arithmetic number, because the mean of its divisors is an integer number (36886680).

Almost surely, 2^561994374 is an apocalyptic number.

561994374 is an abundant number, since it is smaller than the sum of its proper divisors (618379386).

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

561994374 is a wasteful number, since it uses less digits than its factorization.

561994374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26124.

The product of its digits is 816480, while the sum is 48.

The square root of 561994374 is about 23706.4205227192. The cubic root of 561994374 is about 825.2343987775.

The spelling of 561994374 in words is "five hundred sixty-one million, nine hundred ninety-four thousand, three hundred seventy-four".