56553235565 has 4 divisors (see below), whose sum is σ = 67863882684. Its totient is φ = 45242588448.

The previous prime is 56553235553. The next prime is 56553235579.

56553235565 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38848804201 + 17704431364 = 197101^2 + 133058^2 .

It is a cyclic number.

It is not a de Polignac number, because 56553235565 - 2²² = 56549041261 is a prime.

It is a Duffinian number.

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, 5655323552 + ... + 5655323561.

It is an arithmetic number, because the mean of its divisors is an integer number (16965970671).

Almost surely, 2^56553235565 is an apocalyptic number.

It is an amenable number.

56553235565 is a deficient number, since it is larger than the sum of its proper divisors (11310647119).

56553235565 is a wasteful number, since it uses less digits than its factorization.

56553235565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11310647118.

The product of its digits is 10125000, while the sum is 50.

The spelling of 56553235565 in words is "fifty-six billion, five hundred fifty-three million, two hundred thirty-five thousand, five hundred sixty-five".