6805172120858 has 32 divisors (see below), whose sum is σ = 10824275324928. Its totient is φ = 3203104694400.

The previous prime is 6805172120819. The next prime is 6805172120861. The reversal of 6805172120858 is 8580212715086.

It is a Curzon 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, 9867878 + ... + 10534958.

It is an arithmetic number, because the mean of its divisors is an integer number (338258603904).

Almost surely, 2^{6805172120858} is an apocalyptic number.

6805172120858 is a deficient number, since it is larger than the sum of its proper divisors (4019103204070).

6805172120858 is a wasteful number, since it uses less digits than its factorization.

6805172120858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671598.

The product of its (nonzero) digits is 2150400, while the sum is 53.

The spelling of 6805172120858 in words is "six trillion, eight hundred five billion, one hundred seventy-two million, one hundred twenty thousand, eight hundred fifty-eight".