22765756561 has 2 divisors, whose sum is σ = 22765756562. Its totient is φ = 22765756560.

The previous prime is 22765756549. The next prime is 22765756571. The reversal of 22765756561 is 16565756722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16739184400 + 6026572161 = 129380^2 + 77631^2 .

It is a cyclic number.

It is not a de Polignac number, because 22765756561 - 2¹⁷ = 22765625489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22765756499 and 22765756508.

It is not a weakly prime, because it can be changed into another prime (22765756571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11382878280 + 11382878281.

It is an arithmetic number, because the mean of its divisors is an integer number (11382878281).

Almost surely, 2^22765756561 is an apocalyptic number.

It is an amenable number.

22765756561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22765756561 is an equidigital number, since it uses as much as digits as its factorization.

22765756561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292000, while the sum is 52.

The spelling of 22765756561 in words is "twenty-two billion, seven hundred sixty-five million, seven hundred fifty-six thousand, five hundred sixty-one".