561445264 has 80 divisors (see below), whose sum is σ = 1180210176. Its totient is φ = 257792000.

The previous prime is 561445259. The next prime is 561445273. The reversal of 561445264 is 462544165.

561445264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2939409 + ... + 2939599.

Almost surely, 2^561445264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561445264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590105088).

561445264 is an abundant number, since it is smaller than the sum of its proper divisors (618764912).

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

561445264 is a wasteful number, since it uses less digits than its factorization.

561445264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 418 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The square root of 561445264 is about 23694.8362307065. The cubic root of 561445264 is about 824.9655395462.

The spelling of 561445264 in words is "five hundred sixty-one million, four hundred forty-five thousand, two hundred sixty-four".