917117267172 has 24 divisors (see below), whose sum is σ = 2140964733600. Its totient is φ = 305559406656.

The previous prime is 917117267167. The next prime is 917117267233. The reversal of 917117267172 is 271762711719.

917117267172 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×917117267172² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18267522 + ... + 18317657.

It is an arithmetic number, because the mean of its divisors is an integer number (89206863900).

Almost surely, 2^917117267172 is an apocalyptic number.

It is an amenable number.

917117267172 is an abundant number, since it is smaller than the sum of its proper divisors (1223847466428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

917117267172 is a wasteful number, since it uses less digits than its factorization.

917117267172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36587275 (or 36587273 counting only the distinct ones).

The product of its digits is 518616, while the sum is 51.

The spelling of 917117267172 in words is "nine hundred seventeen billion, one hundred seventeen million, two hundred sixty-seven thousand, one hundred seventy-two".