2179618444 has 12 divisors (see below), whose sum is σ = 3816491224. Its totient is φ = 1089192384.

The previous prime is 2179618439. The next prime is 2179618457. The reversal of 2179618444 is 4448169712.

It is a super-2 number, since 2×2179618444² = 9501473122849962272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2179618394 and 2179618403.

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, 146214 + ... + 160429.

Almost surely, 2^2179618444 is an apocalyptic number.

It is an amenable number.

2179618444 is a deficient number, since it is larger than the sum of its proper divisors (1636872780).

2179618444 is a wasteful number, since it uses less digits than its factorization.

2179618444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308424 (or 308422 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 2179618444 is about 46686.3839250803. The cubic root of 2179618444 is about 1296.5626042259.

The spelling of 2179618444 in words is "two billion, one hundred seventy-nine million, six hundred eighteen thousand, four hundred forty-four".