561655038 has 16 divisors (see below), whose sum is σ = 1283783040. Its totient is φ = 160472856.

The previous prime is 561655007. The next prime is 561655049. The reversal of 561655038 is 830556165.

It is a junction number, because it is equal to n+sod(n) for n = 561654987 and 561655005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6686328 + ... + 6686411.

It is an arithmetic number, because the mean of its divisors is an integer number (80236440).

Almost surely, 2^561655038 is an apocalyptic number.

561655038 is an abundant number, since it is smaller than the sum of its proper divisors (722128002).

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

561655038 is a wasteful number, since it uses less digits than its factorization.

561655038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13372751.

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 561655038 is about 23699.2623935852. The cubic root of 561655038 is about 825.0682713015.

The spelling of 561655038 in words is "five hundred sixty-one million, six hundred fifty-five thousand, thirty-eight".