2161618852 has 6 divisors (see below), whose sum is σ = 3782832998. Its totient is φ = 1080809424.

The previous prime is 2161618831. The next prime is 2161618889. The reversal of 2161618852 is 2588161612.

It is a happy number.

2161618852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1664150436 + 497468416 = 40794^2 + 22304^2 .

It is a super-2 number, since 2×2161618852² = 9345192122643595808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270202353 + ... + 270202360.

Almost surely, 2^2161618852 is an apocalyptic number.

It is an amenable number.

2161618852 is a deficient number, since it is larger than the sum of its proper divisors (1621214146).

2161618852 is a wasteful number, since it uses less digits than its factorization.

2161618852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540404717 (or 540404715 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 2161618852 is about 46493.2129670557. The cubic root of 2161618852 is about 1292.9836695709.

The spelling of 2161618852 in words is "two billion, one hundred sixty-one million, six hundred eighteen thousand, eight hundred fifty-two".