179745785857 has 16 divisors (see below), whose sum is σ = 208864075392. Its totient is φ = 152872241920.

The previous prime is 179745785833. The next prime is 179745785903. The reversal of 179745785857 is 758587547971.

It is a cyclic number.

It is not a de Polignac number, because 179745785857 - 2¹⁹ = 179745261569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 179745785857.

It is not an unprimeable number, because it can be changed into a prime (179745785827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2846638 + ... + 2909095.

It is an arithmetic number, because the mean of its divisors is an integer number (13054004712).

Almost surely, 2^179745785857 is an apocalyptic number.

179745785857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

179745785857 is a deficient number, since it is larger than the sum of its proper divisors (29118289535).

179745785857 is a wasteful number, since it uses less digits than its factorization.

179745785857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755928.

The product of its digits is 691488000, while the sum is 73.

The spelling of 179745785857 in words is "one hundred seventy-nine billion, seven hundred forty-five million, seven hundred eighty-five thousand, eight hundred fifty-seven".