8618822444581 has 2 divisors, whose sum is σ = 8618822444582. Its totient is φ = 8618822444580.

The previous prime is 8618822444443. The next prime is 8618822444597. The reversal of 8618822444581 is 1854442288168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6827063508225 + 1791758936356 = 2612865^2 + 1338566^2 .

It is a cyclic number.

It is not a de Polignac number, because 8618822444581 - 2¹⁵ = 8618822411813 is a prime.

It is a super-2 number, since 2×8618822444581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8618822444381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4309411222290 + 4309411222291.

It is an arithmetic number, because the mean of its divisors is an integer number (4309411222291).

Almost surely, 2^{8618822444581} is an apocalyptic number.

It is an amenable number.

8618822444581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8618822444581 is an equidigital number, since it uses as much as digits as its factorization.

8618822444581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31457280, while the sum is 61.

The spelling of 8618822444581 in words is "eight trillion, six hundred eighteen billion, eight hundred twenty-two million, four hundred forty-four thousand, five hundred eighty-one".