2164699879 has 12 divisors (see below), whose sum is σ = 2331048544. Its totient is φ = 2009435904.

The previous prime is 2164699847. The next prime is 2164699883. The reversal of 2164699879 is 9789964612.

It is not a de Polignac number, because 2164699879 - 2⁵ = 2164699847 is a prime.

It is a super-2 number, since 2×2164699879² = 9371851132285229282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164699819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30207 + ... + 72400.

Almost surely, 2^2164699879 is an apocalyptic number.

2164699879 is a deficient number, since it is larger than the sum of its proper divisors (166348665).

2164699879 is a wasteful number, since it uses less digits than its factorization.

2164699879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102714 (or 102697 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 61.

The square root of 2164699879 is about 46526.3353274250. The cubic root of 2164699879 is about 1293.5976887634.

The spelling of 2164699879 in words is "two billion, one hundred sixty-four million, six hundred ninety-nine thousand, eight hundred seventy-nine".