2189156968 has 16 divisors (see below), whose sum is σ = 4109208480. Its totient is φ = 1093368048.

The previous prime is 2189156947. The next prime is 2189157007. The reversal of 2189156968 is 8696519812.

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, 143596 + ... + 158107.

It is an arithmetic number, because the mean of its divisors is an integer number (256825530).

Almost surely, 2^2189156968 is an apocalyptic number.

It is an amenable number.

2189156968 is a deficient number, since it is larger than the sum of its proper divisors (1920051512).

2189156968 is a wasteful number, since it uses less digits than its factorization.

2189156968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302616 (or 302612 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 55.

The square root of 2189156968 is about 46788.4277145535. The cubic root of 2189156968 is about 1298.4512064192.

The spelling of 2189156968 in words is "two billion, one hundred eighty-nine million, one hundred fifty-six thousand, nine hundred sixty-eight".