22581639149 has 2 divisors, whose sum is σ = 22581639150. Its totient is φ = 22581639148.

The previous prime is 22581639133. The next prime is 22581639161. The reversal of 22581639149 is 94193618522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21975987049 + 605652100 = 148243^2 + 24610^2 .

It is a cyclic number.

It is not a de Polignac number, because 22581639149 - 2⁴ = 22581639133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22581639097 and 22581639106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22581639169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11290819574 + 11290819575.

It is an arithmetic number, because the mean of its divisors is an integer number (11290819575).

Almost surely, 2^22581639149 is an apocalyptic number.

It is an amenable number.

22581639149 is a deficient number, since it is larger than the sum of its proper divisors (1).

22581639149 is an equidigital number, since it uses as much as digits as its factorization.

22581639149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The spelling of 22581639149 in words is "twenty-two billion, five hundred eighty-one million, six hundred thirty-nine thousand, one hundred forty-nine".