55980279565 has 24 divisors (see below), whose sum is σ = 78159974112. Its totient is φ = 38378581920.

The previous prime is 55980279521. The next prime is 55980279599. The reversal of 55980279565 is 56597208955.

It is not a de Polignac number, because 55980279565 - 2⁹ = 55980279053 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 23 ways as a sum of consecutive naturals, for example, 1328470 + ... + 1369960.

It is an arithmetic number, because the mean of its divisors is an integer number (3256665588).

Almost surely, 2^55980279565 is an apocalyptic number.

It is an amenable number.

55980279565 is a deficient number, since it is larger than the sum of its proper divisors (22179694547).

55980279565 is a wasteful number, since it uses less digits than its factorization.

55980279565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47017 (or 47010 counting only the distinct ones).

The product of its (nonzero) digits is 34020000, while the sum is 61.

The spelling of 55980279565 in words is "fifty-five billion, nine hundred eighty million, two hundred seventy-nine thousand, five hundred sixty-five".