22205643442877 has 2 divisors, whose sum is σ = 22205643442878. Its totient is φ = 22205643442876.

The previous prime is 22205643442861. The next prime is 22205643443051. The reversal of 22205643442877 is 77824434650222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21837405648601 + 368237794276 = 4673051^2 + 606826^2 .

It is a cyclic number.

It is not a de Polignac number, because 22205643442877 - 2⁴ = 22205643442861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22205643442837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11102821721438 + 11102821721439.

It is an arithmetic number, because the mean of its divisors is an integer number (11102821721439).

Almost surely, 2^{22205643442877} is an apocalyptic number.

It is an amenable number.

22205643442877 is a deficient number, since it is larger than the sum of its proper divisors (1).

22205643442877 is an equidigital number, since it uses as much as digits as its factorization.

22205643442877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36126720, while the sum is 56.

The spelling of 22205643442877 in words is "twenty-two trillion, two hundred five billion, six hundred forty-three million, four hundred forty-two thousand, eight hundred seventy-seven".