22156561633441 has 8 divisors (see below), whose sum is σ = 22755474320040. Its totient is φ = 21557653509888.

The previous prime is 22156561633429. The next prime is 22156561633469. The reversal of 22156561633441 is 14433616565122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5354924593041 + 16801637040400 = 2314071^2 + 4098980^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22156561633441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22156561636441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10207095 + ... + 12185971.

It is an arithmetic number, because the mean of its divisors is an integer number (2844434290005).

Almost surely, 2^{22156561633441} is an apocalyptic number.

It is an amenable number.

22156561633441 is a deficient number, since it is larger than the sum of its proper divisors (598912686599).

22156561633441 is a wasteful number, since it uses less digits than its factorization.

22156561633441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281523.

The product of its digits is 3110400, while the sum is 49.

The spelling of 22156561633441 in words is "twenty-two trillion, one hundred fifty-six billion, five hundred sixty-one million, six hundred thirty-three thousand, four hundred forty-one".