2163985764 has 24 divisors (see below), whose sum is σ = 5050983168. Its totient is φ = 721088160.

The previous prime is 2163985763. The next prime is 2163985787. The reversal of 2163985764 is 4675893612.

2163985764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2163985763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9534 + ... + 66474.

It is an arithmetic number, because the mean of its divisors is an integer number (210457632).

Almost surely, 2^2163985764 is an apocalyptic number.

It is an amenable number.

2163985764 is an abundant number, since it is smaller than the sum of its proper divisors (2886997404).

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

2163985764 is a wasteful number, since it uses less digits than its factorization.

2163985764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60115 (or 60113 counting only the distinct ones).

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

The square root of 2163985764 is about 46518.6603848391. The cubic root of 2163985764 is about 1293.4554243748.

The spelling of 2163985764 in words is "two billion, one hundred sixty-three million, nine hundred eighty-five thousand, seven hundred sixty-four".