561204437922 has 18 divisors (see below), whose sum is σ = 1215949835217. Its totient is φ = 187067086536.

The previous prime is 561204437921. The next prime is 561204437929. The reversal of 561204437922 is 229734402165.

561204437922 is a `hidden beast` number, since 5 + 6 + 1 + 204 + 437 + 9 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 392463407961 + 168741029961 = 626469^2 + 410781^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=529719.

It is a super-2 number, since 2×561204437922² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561204437921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3090028 + ... + 3266600.

Almost surely, 2^561204437922 is an apocalyptic number.

561204437922 is an abundant number, since it is smaller than the sum of its proper divisors (654745397295).

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

561204437922 is an frugal number, since it uses more digits than its factorization.

561204437922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353154 (or 176578 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 561204437922 in words is "five hundred sixty-one billion, two hundred four million, four hundred thirty-seven thousand, nine hundred twenty-two".