55171751615 has 4 divisors (see below), whose sum is σ = 66206101944. Its totient is φ = 44137401288.

The previous prime is 55171751573. The next prime is 55171751623. The reversal of 55171751615 is 51615717155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55171751615 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5517175157 + ... + 5517175166.

It is an arithmetic number, because the mean of its divisors is an integer number (16551525486).

Almost surely, 2^55171751615 is an apocalyptic number.

55171751615 is a deficient number, since it is larger than the sum of its proper divisors (11034350329).

55171751615 is a wasteful number, since it uses less digits than its factorization.

55171751615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11034350328.

The product of its digits is 183750, while the sum is 44.

The spelling of 55171751615 in words is "fifty-five billion, one hundred seventy-one million, seven hundred fifty-one thousand, six hundred fifteen".