15172168855 has 4 divisors (see below), whose sum is σ = 18206602632. Its totient is φ = 12137735080.

The previous prime is 15172168783. The next prime is 15172168877. The reversal of 15172168855 is 55886127151.

15172168855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 15172168855 - 2¹⁵ = 15172136087 is a prime.

It is a super-2 number, since 2×15172168855² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15172168799 and 15172168808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1517216881 + ... + 1517216890.

It is an arithmetic number, because the mean of its divisors is an integer number (4551650658).

Almost surely, 2^15172168855 is an apocalyptic number.

15172168855 is a deficient number, since it is larger than the sum of its proper divisors (3034433777).

15172168855 is an equidigital number, since it uses as much as digits as its factorization.

15172168855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034433776.

The product of its digits is 672000, while the sum is 49.

The spelling of 15172168855 in words is "fifteen billion, one hundred seventy-two million, one hundred sixty-eight thousand, eight hundred fifty-five".