561061006055 has 16 divisors (see below), whose sum is σ = 766413771264. Its totient is φ = 390303307680.

The previous prime is 561061006003. The next prime is 561061006057. The reversal of 561061006055 is 550600160165.

561061006055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561061006055 - 2¹⁰ = 561061005031 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 (561061006057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221761979 + ... + 221764508.

It is an arithmetic number, because the mean of its divisors is an integer number (47900860704).

Almost surely, 2^561061006055 is an apocalyptic number.

561061006055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

561061006055 is a deficient number, since it is larger than the sum of its proper divisors (205352765209).

561061006055 is a wasteful number, since it uses less digits than its factorization.

561061006055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443526526.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 561061006055 in words is "five hundred sixty-one billion, sixty-one million, six thousand, fifty-five".