22161355392 has 128 divisors (see below), whose sum is σ = 66289489920. Its totient is φ = 6498892800.

The previous prime is 22161355339. The next prime is 22161355399. The reversal of 22161355392 is 29355316122.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×22161355392² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22161355392.

It is not an unprimeable number, because it can be changed into a prime (22161355399) 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, 46323 + ... + 215565.

It is an arithmetic number, because the mean of its divisors is an integer number (517886640).

Almost surely, 2^22161355392 is an apocalyptic number.

22161355392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22161355392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33144744960).

22161355392 is an abundant number, since it is smaller than the sum of its proper divisors (44128134528).

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

22161355392 is a wasteful number, since it uses less digits than its factorization.

22161355392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169302 (or 169290 counting only the distinct ones).

The product of its digits is 97200, while the sum is 39.

The spelling of 22161355392 in words is "twenty-two billion, one hundred sixty-one million, three hundred fifty-five thousand, three hundred ninety-two".