561056055 has 16 divisors (see below), whose sum is σ = 1025931264. Its totient is φ = 256482720.

The previous prime is 561056009. The next prime is 561056077. The reversal of 561056055 is 550650165.

It is not a de Polignac number, because 561056055 - 2⁶ = 561055991 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 2671591 + ... + 2671800.

It is an arithmetic number, because the mean of its divisors is an integer number (64120704).

Almost surely, 2^561056055 is an apocalyptic number.

561056055 is a deficient number, since it is larger than the sum of its proper divisors (464875209).

561056055 is a wasteful number, since it uses less digits than its factorization.

561056055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5343406.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 561056055 is about 23686.6218570737. The cubic root of 561056055 is about 824.7748660252.

The spelling of 561056055 in words is "five hundred sixty-one million, fifty-six thousand, fifty-five".