2163530664 has 24 divisors (see below), whose sum is σ = 5859562410. Its totient is φ = 721176864.

The previous prime is 2163530597. The next prime is 2163530669. The reversal of 2163530664 is 4660353612.

2163530664 is a `hidden beast` number, since 2 + 1 + 63 + 530 + 6 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1556302500 + 607228164 = 39450^2 + 24642^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2163530669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15024447 + ... + 15024590.

Almost surely, 2^2163530664 is an apocalyptic number.

2163530664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2163530664 is an abundant number, since it is smaller than the sum of its proper divisors (3696031746).

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

2163530664 is a wasteful number, since it uses less digits than its factorization.

2163530664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30049049 (or 30049042 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 2163530664 is about 46513.7685422284. The cubic root of 2163530664 is about 1293.3647440441.

The spelling of 2163530664 in words is "two billion, one hundred sixty-three million, five hundred thirty thousand, six hundred sixty-four".