2168426857 has 8 divisors (see below), whose sum is σ = 2296449792. Its totient is φ = 2040456000.

The previous prime is 2168426809. The next prime is 2168426903. The reversal of 2168426857 is 7586248612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2168426857 - 2²⁷ = 2034209129 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 2168426857.

It is not an unprimeable number, because it can be changed into a prime (2168436857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101632 + ... + 121102.

It is an arithmetic number, because the mean of its divisors is an integer number (287056224).

Almost surely, 2^2168426857 is an apocalyptic number.

It is an amenable number.

2168426857 is a deficient number, since it is larger than the sum of its proper divisors (128022935).

2168426857 is a wasteful number, since it uses less digits than its factorization.

2168426857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26039.

The product of its digits is 1290240, while the sum is 49.

The square root of 2168426857 is about 46566.3704512173. The cubic root of 2168426857 is about 1294.3396616521.

It can be divided in two parts, 2168 and 426857, that added together give a square (429025 = 655²).

The spelling of 2168426857 in words is "two billion, one hundred sixty-eight million, four hundred twenty-six thousand, eight hundred fifty-seven".