2159612091 has 64 divisors (see below), whose sum is σ = 4029527040. Its totient is φ = 1112590080.

The previous prime is 2159612089. The next prime is 2159612123. The reversal of 2159612091 is 1902169512.

It is not a de Polignac number, because 2159612091 - 2¹ = 2159612089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2159612291) 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 63 ways as a sum of consecutive naturals, for example, 95431 + ... + 115871.

It is an arithmetic number, because the mean of its divisors is an integer number (62961360).

Almost surely, 2^2159612091 is an apocalyptic number.

2159612091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2159612091 is a deficient number, since it is larger than the sum of its proper divisors (1869914949).

2159612091 is a wasteful number, since it uses less digits than its factorization.

2159612091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20513 (or 20507 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 2159612091 is about 46471.6267307268. The cubic root of 2159612091 is about 1292.5834274784.

The spelling of 2159612091 in words is "two billion, one hundred fifty-nine million, six hundred twelve thousand, ninety-one".