2159873808 has 120 divisors (see below), whose sum is σ = 5785275552. Its totient is φ = 694247424.

The previous prime is 2159873791. The next prime is 2159873813. The reversal of 2159873808 is 8083789512.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11190960 + ... + 11191152.

Almost surely, 2^2159873808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2159873808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2892637776).

2159873808 is an abundant number, since it is smaller than the sum of its proper divisors (3625401744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2159873808 is a wasteful number, since it uses less digits than its factorization.

2159873808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The square root of 2159873808 is about 46474.4425248975. The cubic root of 2159873808 is about 1292.6356401564.

The spelling of 2159873808 in words is "two billion, one hundred fifty-nine million, eight hundred seventy-three thousand, eight hundred eight".