561020617536 has 112 divisors (see below), whose sum is σ = 1535336170368. Its totient is φ = 180674150400.

The previous prime is 561020617513. The next prime is 561020617543. The reversal of 561020617536 is 635716020165.

It is a super-2 number, since 2×561020617536² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 464856 + ... + 1156776.

It is an arithmetic number, because the mean of its divisors is an integer number (13708358664).

Almost surely, 2^561020617536 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 561020617536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (767668085184).

561020617536 is an abundant number, since it is smaller than the sum of its proper divisors (974315552832).

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

561020617536 is a wasteful number, since it uses less digits than its factorization.

561020617536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692080 (or 692070 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 561020617536 in words is "five hundred sixty-one billion, twenty million, six hundred seventeen thousand, five hundred thirty-six".