561613652055 has 24 divisors (see below), whose sum is σ = 975036351120. Its totient is φ = 299043377280.

The previous prime is 561613652023. The next prime is 561613652063. The reversal of 561613652055 is 550256316165.

561613652055 is a `hidden beast` number, since 5 + 6 + 1 + 613 + 6 + 5 + 20 + 5 + 5 = 666.

It is not a de Polignac number, because 561613652055 - 2⁵ = 561613652023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 561613652055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10053166 + ... + 10108875.

It is an arithmetic number, because the mean of its divisors is an integer number (40626514630).

Almost surely, 2^561613652055 is an apocalyptic number.

561613652055 is a deficient number, since it is larger than the sum of its proper divisors (413422699065).

561613652055 is a wasteful number, since it uses less digits than its factorization.

561613652055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20162671 (or 20162668 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 561613652055 in words is "five hundred sixty-one billion, six hundred thirteen million, six hundred fifty-two thousand, fifty-five".