2159368665 has 16 divisors (see below), whose sum is σ = 3520179648. Its totient is φ = 1129933376.

The previous prime is 2159368663. The next prime is 2159368667. The reversal of 2159368665 is 5668639512.

It is an interprime number because it is at equal distance from previous prime (2159368663) and next prime (2159368667).

It is a cyclic number.

It is not a de Polignac number, because 2159368665 - 2¹ = 2159368663 is a prime.

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 in 15 ways as a sum of consecutive naturals, for example, 1357299 + ... + 1358888.

It is an arithmetic number, because the mean of its divisors is an integer number (220011228).

Almost surely, 2^2159368665 is an apocalyptic number.

It is an amenable number.

2159368665 is a deficient number, since it is larger than the sum of its proper divisors (1360810983).

2159368665 is a wasteful number, since it uses less digits than its factorization.

2159368665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716248.

The product of its digits is 2332800, while the sum is 51.

The square root of 2159368665 is about 46469.0075749418. The cubic root of 2159368665 is about 1292.5348600779.

The spelling of 2159368665 in words is "two billion, one hundred fifty-nine million, three hundred sixty-eight thousand, six hundred sixty-five".