22097690561 has 4 divisors (see below), whose sum is σ = 22104537300. Its totient is φ = 22090843824.

The previous prime is 22097690557. The next prime is 22097690623. The reversal of 22097690561 is 16509679022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11520802225 + 10576888336 = 107335^2 + 102844^2 .

It is a cyclic number.

It is not a de Polignac number, because 22097690561 - 2² = 22097690557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22097660561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3418526 + ... + 3424983.

It is an arithmetic number, because the mean of its divisors is an integer number (5526134325).

Almost surely, 2^22097690561 is an apocalyptic number.

It is an amenable number.

22097690561 is a deficient number, since it is larger than the sum of its proper divisors (6846739).

22097690561 is an equidigital number, since it uses as much as digits as its factorization.

22097690561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6846738.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 22097690561 in words is "twenty-two billion, ninety-seven million, six hundred ninety thousand, five hundred sixty-one".