2164656544 has 24 divisors (see below), whose sum is σ = 4263059808. Its totient is φ = 1081974720.

The previous prime is 2164656521. The next prime is 2164656551. The reversal of 2164656544 is 4456564612.

It is a self number, because there is not a number n which added to its sum of digits gives 2164656544.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108259 + ... + 126685.

It is an arithmetic number, because the mean of its divisors is an integer number (177627492).

Almost surely, 2^2164656544 is an apocalyptic number.

It is an amenable number.

2164656544 is a deficient number, since it is larger than the sum of its proper divisors (2098403264).

2164656544 is a wasteful number, since it uses less digits than its factorization.

2164656544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22108 (or 22100 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The square root of 2164656544 is about 46525.8696211043. The cubic root of 2164656544 is about 1293.5890565537.

The spelling of 2164656544 in words is "two billion, one hundred sixty-four million, six hundred fifty-six thousand, five hundred forty-four".