22158450491 has 2 divisors, whose sum is σ = 22158450492. Its totient is φ = 22158450490.

The previous prime is 22158450481. The next prime is 22158450511. The reversal of 22158450491 is 19405485122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22158450491 - 2²⁶ = 22091341627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22158450481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11079225245 + 11079225246.

It is an arithmetic number, because the mean of its divisors is an integer number (11079225246).

Almost surely, 2^22158450491 is an apocalyptic number.

22158450491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22158450491 is an equidigital number, since it uses as much as digits as its factorization.

22158450491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 22158450491 in words is "twenty-two billion, one hundred fifty-eight million, four hundred fifty thousand, four hundred ninety-one".