561105684 has 48 divisors (see below), whose sum is σ = 1468871040. Its totient is φ = 185215680.

The previous prime is 561105683. The next prime is 561105691. The reversal of 561105684 is 486501165.

561105684 is a `hidden beast` number, since 561 + 10 + 5 + 6 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561105683) by changing a digit.

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, 14097 + ... + 36344.

It is an arithmetic number, because the mean of its divisors is an integer number (30601480).

Almost surely, 2^561105684 is an apocalyptic number.

561105684 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

561105684 is an abundant number, since it is smaller than the sum of its proper divisors (907765356).

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

561105684 is a wasteful number, since it uses less digits than its factorization.

561105684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50557 (or 50549 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 561105684 is about 23687.6694505812. The cubic root of 561105684 is about 824.7991841806.

The spelling of 561105684 in words is "five hundred sixty-one million, one hundred five thousand, six hundred eighty-four".