22165631577809 has 2 divisors, whose sum is σ = 22165631577810. Its totient is φ = 22165631577808.

The previous prime is 22165631577781. The next prime is 22165631577841. The reversal of 22165631577809 is 90877513656122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21674471692225 + 491159885584 = 4655585^2 + 700828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22165631577809 is a prime.

It is not a weakly prime, because it can be changed into another prime (22165631507809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11082815788904 + 11082815788905.

It is an arithmetic number, because the mean of its divisors is an integer number (11082815788905).

Almost surely, 2^{22165631577809} is an apocalyptic number.

It is an amenable number.

22165631577809 is a deficient number, since it is larger than the sum of its proper divisors (1).

22165631577809 is an equidigital number, since it uses as much as digits as its factorization.

22165631577809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38102400, while the sum is 62.

The spelling of 22165631577809 in words is "twenty-two trillion, one hundred sixty-five billion, six hundred thirty-one million, five hundred seventy-seven thousand, eight hundred nine".