909922172172 has 96 divisors (see below), whose sum is σ = 2293757706240. Its totient is φ = 279084737280.

The previous prime is 909922172167. The next prime is 909922172177. The reversal of 909922172172 is 271271229909.

It is an interprime number because it is at equal distance from previous prime (909922172167) and next prime (909922172177).

It is a super-2 number, since 2×909922172172² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (909922172177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128100373 + ... + 128107475.

It is an arithmetic number, because the mean of its divisors is an integer number (23893309440).

Almost surely, 2^909922172172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 909922172172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146878853120).

909922172172 is an abundant number, since it is smaller than the sum of its proper divisors (1383835534068).

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

909922172172 is a wasteful number, since it uses less digits than its factorization.

909922172172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9623 (or 9621 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 51.

The spelling of 909922172172 in words is "nine hundred nine billion, nine hundred twenty-two million, one hundred seventy-two thousand, one hundred seventy-two".