22643433557 has 2 divisors, whose sum is σ = 22643433558. Its totient is φ = 22643433556.

The previous prime is 22643433481. The next prime is 22643433563. The reversal of 22643433557 is 75533434622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15526655236 + 7116778321 = 124606^2 + 84361^2 .

It is a cyclic number.

It is not a de Polignac number, because 22643433557 - 2¹⁸ = 22643171413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22643433587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11321716778 + 11321716779.

It is an arithmetic number, because the mean of its divisors is an integer number (11321716779).

Almost surely, 2^22643433557 is an apocalyptic number.

It is an amenable number.

22643433557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22643433557 is an equidigital number, since it uses as much as digits as its factorization.

22643433557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 44.

The spelling of 22643433557 in words is "twenty-two billion, six hundred forty-three million, four hundred thirty-three thousand, five hundred fifty-seven".