2159368664 has 8 divisors (see below), whose sum is σ = 4048816260. Its totient is φ = 1079684328.

The previous prime is 2159368663. The next prime is 2159368667. The reversal of 2159368664 is 4668639512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159368663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134960534 + ... + 134960549.

Almost surely, 2^2159368664 is an apocalyptic number.

It is an amenable number.

2159368664 is a deficient number, since it is larger than the sum of its proper divisors (1889447596).

2159368664 is a wasteful number, since it uses less digits than its factorization.

2159368664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269921089 (or 269921085 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 50.

The square root of 2159368664 is about 46469.0075641820. The cubic root of 2159368664 is about 1292.5348598784.

The spelling of 2159368664 in words is "two billion, one hundred fifty-nine million, three hundred sixty-eight thousand, six hundred sixty-four".