22172111057647 has 2 divisors, whose sum is σ = 22172111057648. Its totient is φ = 22172111057646.

The previous prime is 22172111057641. The next prime is 22172111057779. The reversal of 22172111057647 is 74675011127122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22172111057647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22172111057597 and 22172111057606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22172111057641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11086055528823 + 11086055528824.

It is an arithmetic number, because the mean of its divisors is an integer number (11086055528824).

Almost surely, 2^{22172111057647} is an apocalyptic number.

22172111057647 is a deficient number, since it is larger than the sum of its proper divisors (1).

22172111057647 is an equidigital number, since it uses as much as digits as its factorization.

22172111057647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 22172111057647 in words is "twenty-two trillion, one hundred seventy-two billion, one hundred eleven million, fifty-seven thousand, six hundred forty-seven".