18888041613457 has 2 divisors, whose sum is σ = 18888041613458. Its totient is φ = 18888041613456.

The previous prime is 18888041613439. The next prime is 18888041613509. The reversal of 18888041613457 is 75431614088881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11877149112976 + 7010892500481 = 3446324^2 + 2647809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18888041613457 is a prime.

It is not a weakly prime, because it can be changed into another prime (18888041611457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9444020806728 + 9444020806729.

It is an arithmetic number, because the mean of its divisors is an integer number (9444020806729).

Almost surely, 2^{18888041613457} is an apocalyptic number.

It is an amenable number.

18888041613457 is a deficient number, since it is larger than the sum of its proper divisors (1).

18888041613457 is an equidigital number, since it uses as much as digits as its factorization.

18888041613457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41287680, while the sum is 64.

The spelling of 18888041613457 in words is "eighteen trillion, eight hundred eighty-eight billion, forty-one million, six hundred thirteen thousand, four hundred fifty-seven".