9018912172 has 48 divisors (see below), whose sum is σ = 17022458880. Its totient is φ = 4168281600.

The previous prime is 9018912137. The next prime is 9018912197. The reversal of 9018912172 is 2712198109.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514797 + ... + 532027.

It is an arithmetic number, because the mean of its divisors is an integer number (354634560).

Almost surely, 2^9018912172 is an apocalyptic number.

It is an amenable number.

9018912172 is a deficient number, since it is larger than the sum of its proper divisors (8003546708).

9018912172 is a wasteful number, since it uses less digits than its factorization.

9018912172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17422 (or 17420 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 9018912172 is about 94967.9533948163. The cubic root of 9018912172 is about 2081.5398000961.

The spelling of 9018912172 in words is "nine billion, eighteen million, nine hundred twelve thousand, one hundred seventy-two".