55189892161 has 4 divisors (see below), whose sum is σ = 55214089924. Its totient is φ = 55165694400.

The previous prime is 55189892123. The next prime is 55189892183. The reversal of 55189892161 is 16129898155.

It is a happy number.

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 17720934400 + 37468957761 = 133120^2 + 193569^2 .

It is a cyclic number.

It is not a de Polignac number, because 55189892161 - 2²⁹ = 54653021249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55189892561) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12095460 + ... + 12100021.

It is an arithmetic number, because the mean of its divisors is an integer number (13803522481).

Almost surely, 2^55189892161 is an apocalyptic number.

It is an amenable number.

55189892161 is a deficient number, since it is larger than the sum of its proper divisors (24197763).

55189892161 is a wasteful number, since it uses less digits than its factorization.

55189892161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24197762.

The product of its digits is 1555200, while the sum is 55.

The spelling of 55189892161 in words is "fifty-five billion, one hundred eighty-nine million, eight hundred ninety-two thousand, one hundred sixty-one".