561040116 has 72 divisors (see below), whose sum is σ = 1620085824. Its totient is φ = 147962880.

The previous prime is 561040097. The next prime is 561040133. The reversal of 561040116 is 611040165.

It is a super-2 number, since 2×561040116² = 629532023522586912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5565 + ... + 33956.

It is an arithmetic number, because the mean of its divisors is an integer number (22501192).

Almost surely, 2^561040116 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 561040116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810042912).

561040116 is an abundant number, since it is smaller than the sum of its proper divisors (1059045708).

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

561040116 is a wasteful number, since it uses less digits than its factorization.

561040116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39561 (or 39546 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 561040116 is about 23686.2853989392. The cubic root of 561040116 is about 824.7670556285.

The spelling of 561040116 in words is "five hundred sixty-one million, forty thousand, one hundred sixteen".