8123617855 has 4 divisors (see below), whose sum is σ = 9748341432. Its totient is φ = 6498894280.

The previous prime is 8123617849. The next prime is 8123617889. The reversal of 8123617855 is 5587163218.

8123617855 is digitally balanced in base 3, 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 8123617855 - 2⁵ = 8123617823 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812361781 + ... + 812361790.

It is an arithmetic number, because the mean of its divisors is an integer number (2437085358).

Almost surely, 2^8123617855 is an apocalyptic number.

8123617855 is a deficient number, since it is larger than the sum of its proper divisors (1624723577).

8123617855 is a wasteful number, since it uses less digits than its factorization.

8123617855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624723576.

The product of its digits is 403200, while the sum is 46.

The square root of 8123617855 is about 90131.1147994964. The cubic root of 8123617855 is about 2010.2488784505.

The spelling of 8123617855 in words is "eight billion, one hundred twenty-three million, six hundred seventeen thousand, eight hundred fifty-five".