18448240472569 has 2 divisors, whose sum is σ = 18448240472570. Its totient is φ = 18448240472568.

The previous prime is 18448240472551. The next prime is 18448240472653. The reversal of 18448240472569 is 96527404284481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14616093610000 + 3832146862569 = 3823100^2 + 1957587^2 .

It is a cyclic number.

It is not a de Polignac number, because 18448240472569 - 2⁵ = 18448240472537 is a prime.

It is a super-2 number, since 2×18448240472569² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18448240472569.

It is not a weakly prime, because it can be changed into another prime (18448240472869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9224120236284 + 9224120236285.

It is an arithmetic number, because the mean of its divisors is an integer number (9224120236285).

Almost surely, 2^{18448240472569} is an apocalyptic number.

It is an amenable number.

18448240472569 is a deficient number, since it is larger than the sum of its proper divisors (1).

18448240472569 is an equidigital number, since it uses as much as digits as its factorization.

18448240472569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123863040, while the sum is 64.

The spelling of 18448240472569 in words is "eighteen trillion, four hundred forty-eight billion, two hundred forty million, four hundred seventy-two thousand, five hundred sixty-nine".