22168887409 has 2 divisors, whose sum is σ = 22168887410. Its totient is φ = 22168887408.

The previous prime is 22168887347. The next prime is 22168887427. The reversal of 22168887409 is 90478886122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16554682225 + 5614205184 = 128665^2 + 74928^2 .

It is a cyclic number.

It is not a de Polignac number, because 22168887409 - 2¹⁹ = 22168363121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22168887409.

It is not a weakly prime, because it can be changed into another prime (22168887509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11084443704 + 11084443705.

It is an arithmetic number, because the mean of its divisors is an integer number (11084443705).

Almost surely, 2^22168887409 is an apocalyptic number.

It is an amenable number.

22168887409 is a deficient number, since it is larger than the sum of its proper divisors (1).

22168887409 is an equidigital number, since it uses as much as digits as its factorization.

22168887409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 22168887409 in words is "twenty-two billion, one hundred sixty-eight million, eight hundred eighty-seven thousand, four hundred nine".