2157664822 has 16 divisors (see below), whose sum is σ = 3381707232. Its totient is φ = 1030553920.

The previous prime is 2157664807. The next prime is 2157664853. The reversal of 2157664822 is 2284667512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4188 + ... + 65824.

It is an arithmetic number, because the mean of its divisors is an integer number (211356702).

Almost surely, 2^2157664822 is an apocalyptic number.

2157664822 is a deficient number, since it is larger than the sum of its proper divisors (1224042410).

2157664822 is a wasteful number, since it uses less digits than its factorization.

2157664822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62423.

The product of its digits is 322560, while the sum is 43.

The square root of 2157664822 is about 46450.6708455325. The cubic root of 2157664822 is about 1292.1948137800.

The spelling of 2157664822 in words is "two billion, one hundred fifty-seven million, six hundred sixty-four thousand, eight hundred twenty-two".