9218867848172 has 12 divisors (see below), whose sum is σ = 16653438693696. Its totient is φ = 4460742507120.

The previous prime is 9218867848133. The next prime is 9218867848181. The reversal of 9218867848172 is 2718487688129.

It is a junction number, because it is equal to n+sod(n) for n = 9218867848096 and 9218867848105.

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, 37172854103 + ... + 37172854350.

It is an arithmetic number, because the mean of its divisors is an integer number (1387786557808).

Almost surely, 2^{9218867848172} is an apocalyptic number.

It is an amenable number.

9218867848172 is a deficient number, since it is larger than the sum of its proper divisors (7434570845524).

9218867848172 is a wasteful number, since it uses less digits than its factorization.

9218867848172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74345708488 (or 74345708486 counting only the distinct ones).

The product of its digits is 173408256, while the sum is 71.

The spelling of 9218867848172 in words is "nine trillion, two hundred eighteen billion, eight hundred sixty-seven million, eight hundred forty-eight thousand, one hundred seventy-two".