55171522615 has 16 divisors (see below), whose sum is σ = 72341262720. Its totient is φ = 40059897120.

The previous prime is 55171522607. The next prime is 55171522639. The reversal of 55171522615 is 51622517155.

55171522615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55171522615 - 2³ = 55171522607 is a prime.

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, 776229 + ... + 844318.

It is an arithmetic number, because the mean of its divisors is an integer number (4521328920).

Almost surely, 2^55171522615 is an apocalyptic number.

55171522615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55171522615 is a deficient number, since it is larger than the sum of its proper divisors (17169740105).

55171522615 is a wasteful number, since it uses less digits than its factorization.

55171522615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621182.

The product of its digits is 105000, while the sum is 40.

The spelling of 55171522615 in words is "fifty-five billion, one hundred seventy-one million, five hundred twenty-two thousand, six hundred fifteen".