561685104 has 50 divisors (see below), whose sum is σ = 1625683400. Its totient is φ = 187227936.

The previous prime is 561685097. The next prime is 561685129. The reversal of 561685104 is 401586165.

561685104 is a `hidden beast` number, since 561 + 6 + 85 + 10 + 4 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 215404 + ... + 217995.

It is an arithmetic number, because the mean of its divisors is an integer number (32513668).

Almost surely, 2^561685104 is an apocalyptic number.

561685104 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

561685104 is an abundant number, since it is smaller than the sum of its proper divisors (1063998296).

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

561685104 is a wasteful number, since it uses less digits than its factorization.

561685104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433419 (or 433404 counting only the distinct ones).

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

The square root of 561685104 is about 23699.8967086357. The cubic root of 561685104 is about 825.0829933037.

The spelling of 561685104 in words is "five hundred sixty-one million, six hundred eighty-five thousand, one hundred four".