8912181944 has 16 divisors (see below), whose sum is σ = 16712665200. Its totient is φ = 4455471232.

The previous prime is 8912181917. The next prime is 8912181973. The reversal of 8912181944 is 4491812198.

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 3 ways as a sum of consecutive naturals, for example, 13217 + ... + 134160.

It is an arithmetic number, because the mean of its divisors is an integer number (1044541575).

Almost surely, 2^8912181944 is an apocalyptic number.

It is an amenable number.

8912181944 is a deficient number, since it is larger than the sum of its proper divisors (7800483256).

8912181944 is a wasteful number, since it uses less digits than its factorization.

8912181944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154942 (or 154938 counting only the distinct ones).

The product of its digits is 165888, while the sum is 47.

The square root of 8912181944 is about 94404.3534165665. The cubic root of 8912181944 is about 2073.2961825371.

The spelling of 8912181944 in words is "eight billion, nine hundred twelve million, one hundred eighty-one thousand, nine hundred forty-four".