55872173971 has 4 divisors (see below), whose sum is σ = 55905061000. Its totient is φ = 55839286944.

The previous prime is 55872173953. The next prime is 55872173977. The reversal of 55872173971 is 17937127855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17937127855 = 5 ⋅3587425571.

It is a cyclic number.

It is not a de Polignac number, because 55872173971 - 2²⁵ = 55838619539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55872173977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16440966 + ... + 16444363.

It is an arithmetic number, because the mean of its divisors is an integer number (13976265250).

Almost surely, 2^55872173971 is an apocalyptic number.

55872173971 is a deficient number, since it is larger than the sum of its proper divisors (32887029).

55872173971 is a wasteful number, since it uses less digits than its factorization.

55872173971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32887028.

The product of its digits is 3704400, while the sum is 55.

The spelling of 55872173971 in words is "fifty-five billion, eight hundred seventy-two million, one hundred seventy-three thousand, nine hundred seventy-one".