22172489256 has 64 divisors (see below), whose sum is σ = 58132224000. Its totient is φ = 7033929408.

The previous prime is 22172489249. The next prime is 22172489257. The reversal of 22172489256 is 65298427122.

It is not an unprimeable number, because it can be changed into a prime (22172489257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8925 + ... + 210771.

It is an arithmetic number, because the mean of its divisors is an integer number (908316000).

Almost surely, 2^22172489256 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 22172489256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29066112000).

22172489256 is an abundant number, since it is smaller than the sum of its proper divisors (35959734744).

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

22172489256 is a wasteful number, since it uses less digits than its factorization.

22172489256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202078 (or 202074 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The spelling of 22172489256 in words is "twenty-two billion, one hundred seventy-two million, four hundred eighty-nine thousand, two hundred fifty-six".