561912876 has 120 divisors (see below), whose sum is σ = 1694948640. Its totient is φ = 159003648.

The previous prime is 561912833. The next prime is 561912877. The reversal of 561912876 is 678219165.

561912876 is a `hidden beast` number, since 5 + 619 + 1 + 28 + 7 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561912877) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 246076 + ... + 248348.

It is an arithmetic number, because the mean of its divisors is an integer number (14124572).

Almost surely, 2^561912876 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 561912876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (847474320).

561912876 is an abundant number, since it is smaller than the sum of its proper divisors (1133035764).

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

561912876 is a wasteful number, since it uses less digits than its factorization.

561912876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405 (or 2394 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 561912876 is about 23704.7015589735. The cubic root of 561912876 is about 825.1945062047.

The spelling of 561912876 in words is "five hundred sixty-one million, nine hundred twelve thousand, eight hundred seventy-six".