20655161615056 has 20 divisors (see below), whose sum is σ = 42373456549092. Its totient is φ = 9720076054016.

The previous prime is 20655161615021. The next prime is 20655161615063. The reversal of 20655161615056 is 65051616155602.

It can be written as a sum of positive squares in 2 ways, for example, as 5723769153600 + 14931392461456 = 2392440^2 + 3864116^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37969046815 + ... + 37969047358.

Almost surely, 2^{20655161615056} is an apocalyptic number.

It is an amenable number.

20655161615056 is an abundant number, since it is smaller than the sum of its proper divisors (21718294934036).

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

20655161615056 is a wasteful number, since it uses less digits than its factorization.

20655161615056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75938094198 (or 75938094192 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 49.

The spelling of 20655161615056 in words is "twenty trillion, six hundred fifty-five billion, one hundred sixty-one million, six hundred fifteen thousand, fifty-six".