2159888640 has 432 divisors, whose sum is σ = 8651418048. Its totient is φ = 455196672.

The previous prime is 2159888609. The next prime is 2159888663. The reversal of 2159888640 is 468889512.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2445639 + ... + 2446521.

Almost surely, 2^2159888640 is an apocalyptic number.

2159888640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2159888640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4325709024).

2159888640 is an abundant number, since it is smaller than the sum of its proper divisors (6491529408).

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

2159888640 is a wasteful number, since it uses less digits than its factorization.

2159888640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The square root of 2159888640 is about 46474.6020961987. The cubic root of 2159888640 is about 1292.6385990219.

The spelling of 2159888640 in words is "two billion, one hundred fifty-nine million, eight hundred eighty-eight thousand, six hundred forty".