561187608 has 32 divisors (see below), whose sum is σ = 1416087360. Its totient is φ = 185313440.

The previous prime is 561187597. The next prime is 561187609. The reversal of 561187608 is 806781165.

It is a self number, because there is not a number n which added to its sum of digits gives 561187608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561187609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106698 + ... + 111833.

It is an arithmetic number, because the mean of its divisors is an integer number (44252730).

Almost surely, 2^561187608 is an apocalyptic number.

It is an amenable number.

561187608 is an abundant number, since it is smaller than the sum of its proper divisors (854899752).

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

561187608 is a wasteful number, since it uses less digits than its factorization.

561187608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218647 (or 218643 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 561187608 is about 23689.3986415865. The cubic root of 561187608 is about 824.8393237134.

The spelling of 561187608 in words is "five hundred sixty-one million, one hundred eighty-seven thousand, six hundred eight".