2159646873 has 4 divisors (see below), whose sum is σ = 2879529168. Its totient is φ = 1439764580.

The previous prime is 2159646859. The next prime is 2159646877. The reversal of 2159646873 is 3786469512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2159646873 - 2⁴ = 2159646857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2159646877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359941143 + ... + 359941148.

It is an arithmetic number, because the mean of its divisors is an integer number (719882292).

Almost surely, 2^2159646873 is an apocalyptic number.

It is an amenable number.

2159646873 is a deficient number, since it is larger than the sum of its proper divisors (719882295).

2159646873 is an equidigital number, since it uses as much as digits as its factorization.

2159646873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719882294.

The product of its digits is 2177280, while the sum is 51.

The square root of 2159646873 is about 46472.0009575658. Note that the first 3 decimals coincide. The cubic root of 2159646873 is about 1292.5903667486.

The spelling of 2159646873 in words is "two billion, one hundred fifty-nine million, six hundred forty-six thousand, eight hundred seventy-three".