55566722845 has 16 divisors (see below), whose sum is σ = 66973433472. Its totient is φ = 44258004160.

The previous prime is 55566722819. The next prime is 55566722909. The reversal of 55566722845 is 54822766555.

It is not a de Polignac number, because 55566722845 - 2⁹ = 55566722333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2369799 + ... + 2393131.

It is an arithmetic number, because the mean of its divisors is an integer number (4185839592).

Almost surely, 2^55566722845 is an apocalyptic number.

It is an amenable number.

55566722845 is a deficient number, since it is larger than the sum of its proper divisors (11406710627).

55566722845 is a wasteful number, since it uses less digits than its factorization.

55566722845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25412.

The product of its digits is 20160000, while the sum is 55.

The spelling of 55566722845 in words is "fifty-five billion, five hundred sixty-six million, seven hundred twenty-two thousand, eight hundred forty-five".