55391427525165 has 16 divisors (see below), whose sum is σ = 88788306510528. Its totient is φ = 29488087190016.

The previous prime is 55391427525151. The next prime is 55391427525173. The reversal of 55391427525165 is 56152572419355.

It is a happy number.

It is not a de Polignac number, because 55391427525165 - 2²² = 55391423330861 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55391427525099 and 55391427525108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3375459652 + ... + 3375476061.

It is an arithmetic number, because the mean of its divisors is an integer number (5549269156908).

Almost surely, 2^{55391427525165} is an apocalyptic number.

It is an amenable number.

55391427525165 is a deficient number, since it is larger than the sum of its proper divisors (33396878985363).

55391427525165 is a wasteful number, since it uses less digits than its factorization.

55391427525165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6750936268.

The product of its digits is 56700000, while the sum is 60.

The spelling of 55391427525165 in words is "fifty-five trillion, three hundred ninety-one billion, four hundred twenty-seven million, five hundred twenty-five thousand, one hundred sixty-five".