22161191489 has 2 divisors, whose sum is σ = 22161191490. Its totient is φ = 22161191488.

The previous prime is 22161191471. The next prime is 22161191501. The reversal of 22161191489 is 98419116122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21965611264 + 195580225 = 148208^2 + 13985^2 .

It is a cyclic number.

It is not a de Polignac number, because 22161191489 - 2²⁰ = 22160142913 is a prime.

It is a super-2 number, since 2×22161191489² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22161191089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11080595744 + 11080595745.

It is an arithmetic number, because the mean of its divisors is an integer number (11080595745).

Almost surely, 2^22161191489 is an apocalyptic number.

It is an amenable number.

22161191489 is a deficient number, since it is larger than the sum of its proper divisors (1).

22161191489 is an equidigital number, since it uses as much as digits as its factorization.

22161191489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 44.

The spelling of 22161191489 in words is "twenty-two billion, one hundred sixty-one million, one hundred ninety-one thousand, four hundred eighty-nine".