561255633444 has 24 divisors (see below), whose sum is σ = 1428650703648. Its totient is φ = 170077464640.

The previous prime is 561255633409. The next prime is 561255633487. The reversal of 561255633444 is 444336552165.

It is a super-2 number, since 2×561255633444² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561255633393 and 561255633402.

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, 2125968177 + ... + 2125968440.

It is an arithmetic number, because the mean of its divisors is an integer number (59527112652).

Almost surely, 2^561255633444 is an apocalyptic number.

It is an amenable number.

561255633444 is an abundant number, since it is smaller than the sum of its proper divisors (867395070204).

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

561255633444 is a wasteful number, since it uses less digits than its factorization.

561255633444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251936635 (or 4251936633 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 48.

The spelling of 561255633444 in words is "five hundred sixty-one billion, two hundred fifty-five million, six hundred thirty-three thousand, four hundred forty-four".