22651256363609 has 2 divisors, whose sum is σ = 22651256363610. Its totient is φ = 22651256363608.

The previous prime is 22651256363591. The next prime is 22651256363683. The reversal of 22651256363609 is 90636365215622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18909043493209 + 3742212870400 = 4348453^2 + 1934480^2 .

It is a cyclic number.

It is not a de Polignac number, because 22651256363609 - 2⁸ = 22651256363353 is a prime.

It is not a weakly prime, because it can be changed into another prime (22651256363809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11325628181804 + 11325628181805.

It is an arithmetic number, because the mean of its divisors is an integer number (11325628181805).

Almost surely, 2^{22651256363609} is an apocalyptic number.

It is an amenable number.

22651256363609 is a deficient number, since it is larger than the sum of its proper divisors (1).

22651256363609 is an equidigital number, since it uses as much as digits as its factorization.

22651256363609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20995200, while the sum is 56.

The spelling of 22651256363609 in words is "twenty-two trillion, six hundred fifty-one billion, two hundred fifty-six million, three hundred sixty-three thousand, six hundred nine".