22156304566440 has 256 divisors, whose sum is σ = 76786514784000. Its totient is φ = 5054639636480.

The previous prime is 22156304566427. The next prime is 22156304566477. The reversal of 22156304566440 is 4466540365122.

It is a self number, because there is not a number n which added to its sum of digits gives 22156304566440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 193128616 + ... + 193243304.

It is an arithmetic number, because the mean of its divisors is an integer number (299947323375).

Almost surely, 2^{22156304566440} is an apocalyptic number.

22156304566440 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 22156304566440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38393257392000).

22156304566440 is an abundant number, since it is smaller than the sum of its proper divisors (54630210217560).

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

22156304566440 is a wasteful number, since it uses less digits than its factorization.

22156304566440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123340 (or 123336 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 22156304566440 in words is "twenty-two trillion, one hundred fifty-six billion, three hundred four million, five hundred sixty-six thousand, four hundred forty".