561083650944 has 128 divisors (see below), whose sum is σ = 1502688153600. Its totient is φ = 185488736256.

The previous prime is 561083650937. The next prime is 561083650969. The reversal of 561083650944 is 449056380165.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×561083650944² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26315232 + ... + 26336544.

It is an arithmetic number, because the mean of its divisors is an integer number (11739751200).

Almost surely, 2^561083650944 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 561083650944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751344076800).

561083650944 is an abundant number, since it is smaller than the sum of its proper divisors (941604502656).

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

561083650944 is a wasteful number, since it uses less digits than its factorization.

561083650944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21892 (or 21880 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 561083650944 in words is "five hundred sixty-one billion, eighty-three million, six hundred fifty thousand, nine hundred forty-four".