561000055055 has 8 divisors (see below), whose sum is σ = 734400072144. Its totient is φ = 408000040000.

The previous prime is 561000055051. The next prime is 561000055061. The reversal of 561000055055 is 550550000165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561000055055 - 2² = 561000055051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561000055051) by changing a digit.

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, 5100000446 + ... + 5100000555.

It is an arithmetic number, because the mean of its divisors is an integer number (91800009018).

Almost surely, 2^561000055055 is an apocalyptic number.

561000055055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

561000055055 is a deficient number, since it is larger than the sum of its proper divisors (173400017089).

561000055055 is a wasteful number, since it uses less digits than its factorization.

561000055055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200001017.

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 561000055055 in words is "five hundred sixty-one billion, fifty-five thousand, fifty-five".