55812189979 has 16 divisors (see below), whose sum is σ = 70548468928. Its totient is φ = 42965603712.

The previous prime is 55812189947. The next prime is 55812189991. The reversal of 55812189979 is 97998121855.

It is a cyclic number.

It is not a de Polignac number, because 55812189979 - 2⁵ = 55812189947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55812189979.

It is not an unprimeable number, because it can be changed into a prime (55812184979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8284752 + ... + 8291485.

It is an arithmetic number, because the mean of its divisors is an integer number (4409279308).

Almost surely, 2^55812189979 is an apocalyptic number.

55812189979 is a deficient number, since it is larger than the sum of its proper divisors (14736278949).

55812189979 is a wasteful number, since it uses less digits than its factorization.

55812189979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16576294.

The product of its digits is 16329600, while the sum is 64.

It can be divided in two parts, 5581 and 2189979, that added together give a triangular number (2195560 = T₂₀₉₅).

The spelling of 55812189979 in words is "fifty-five billion, eight hundred twelve million, one hundred eighty-nine thousand, nine hundred seventy-nine".