55132618821 has 16 divisors (see below), whose sum is σ = 85799092224. Its totient is φ = 30834047664.

The previous prime is 55132618817. The next prime is 55132618883. The reversal of 55132618821 is 12881623155.

It is not a de Polignac number, because 55132618821 - 2² = 55132618817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55132618721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27928405 + ... + 27930378.

It is an arithmetic number, because the mean of its divisors is an integer number (5362443264).

Almost surely, 2^55132618821 is an apocalyptic number.

It is an amenable number.

55132618821 is a deficient number, since it is larger than the sum of its proper divisors (30666473403).

55132618821 is a wasteful number, since it uses less digits than its factorization.

55132618821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55858840.

The product of its digits is 115200, while the sum is 42.

The spelling of 55132618821 in words is "fifty-five billion, one hundred thirty-two million, six hundred eighteen thousand, eight hundred twenty-one".