22097690557 has 2 divisors, whose sum is σ = 22097690558. Its totient is φ = 22097690556.

The previous prime is 22097690543. The next prime is 22097690623. The reversal of 22097690557 is 75509679022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21524997796 + 572692761 = 146714^2 + 23931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22097690557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22097690957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11048845278 + 11048845279.

It is an arithmetic number, because the mean of its divisors is an integer number (11048845279).

Almost surely, 2^22097690557 is an apocalyptic number.

It is an amenable number.

22097690557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22097690557 is an equidigital number, since it uses as much as digits as its factorization.

22097690557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 22097690557 in words is "twenty-two billion, ninety-seven million, six hundred ninety thousand, five hundred fifty-seven".