22278896657 has 2 divisors, whose sum is σ = 22278896658. Its totient is φ = 22278896656.

The previous prime is 22278896597. The next prime is 22278896677. The reversal of 22278896657 is 75669887222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18600595456 + 3678301201 = 136384^2 + 60649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22278896657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22278896657.

It is not a weakly prime, because it can be changed into another prime (22278896677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11139448328 + 11139448329.

It is an arithmetic number, because the mean of its divisors is an integer number (11139448329).

Almost surely, 2^22278896657 is an apocalyptic number.

It is an amenable number.

22278896657 is a deficient number, since it is larger than the sum of its proper divisors (1).

22278896657 is an equidigital number, since it uses as much as digits as its factorization.

22278896657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40642560, while the sum is 62.

The spelling of 22278896657 in words is "twenty-two billion, two hundred seventy-eight million, eight hundred ninety-six thousand, six hundred fifty-seven".