55189232173 has 2 divisors, whose sum is σ = 55189232174. Its totient is φ = 55189232172.

The previous prime is 55189232149. The next prime is 55189232183. The reversal of 55189232173 is 37123298155.

55189232173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32760276004 + 22428956169 = 180998^2 + 149763^2 .

It is a cyclic number.

It is not a de Polignac number, because 55189232173 - 2²¹ = 55187135021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55189232183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27594616086 + 27594616087.

It is an arithmetic number, because the mean of its divisors is an integer number (27594616087).

Almost surely, 2^55189232173 is an apocalyptic number.

It is an amenable number.

55189232173 is a deficient number, since it is larger than the sum of its proper divisors (1).

55189232173 is an equidigital number, since it uses as much as digits as its factorization.

55189232173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 46.

The spelling of 55189232173 in words is "fifty-five billion, one hundred eighty-nine million, two hundred thirty-two thousand, one hundred seventy-three".