561773644 has 24 divisors (see below), whose sum is σ = 1001130368. Its totient is φ = 275754240.

The previous prime is 561773623. The next prime is 561773669. The reversal of 561773644 is 446377165.

It is a self number, because there is not a number n which added to its sum of digits gives 561773644.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 146212 + ... + 150004.

Almost surely, 2^561773644 is an apocalyptic number.

It is an amenable number.

561773644 is a deficient number, since it is larger than the sum of its proper divisors (439356724).

561773644 is a wasteful number, since it uses less digits than its factorization.

561773644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4465 (or 4463 counting only the distinct ones).

The product of its digits is 423360, while the sum is 43.

The square root of 561773644 is about 23701.7645756598. The cubic root of 561773644 is about 825.1263444088.

The spelling of 561773644 in words is "five hundred sixty-one million, seven hundred seventy-three thousand, six hundred forty-four".