22081556880 has 160 divisors (see below), whose sum is σ = 76136198400. Its totient is φ = 5882416128.

The previous prime is 22081556879. The next prime is 22081556881. The reversal of 22081556880 is 8865518022.

22081556880 is a `hidden beast` number, since 2 + 2 + 0 + 8 + 1 + 5 + 568 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (22081556879) and next prime (22081556881).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (22081556881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2364861 + ... + 2374179.

It is an arithmetic number, because the mean of its divisors is an integer number (475851240).

Almost surely, 2^22081556880 is an apocalyptic number.

22081556880 is a gapful number since it is divisible by the number (20) 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 22081556880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38068099200).

22081556880 is an abundant number, since it is smaller than the sum of its proper divisors (54054641520).

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

22081556880 is a wasteful number, since it uses less digits than its factorization.

22081556880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10438 (or 10426 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 22081556880 in words is "twenty-two billion, eighty-one million, five hundred fifty-six thousand, eight hundred eighty".