18399714363749 has 2 divisors, whose sum is σ = 18399714363750. Its totient is φ = 18399714363748.

The previous prime is 18399714363691. The next prime is 18399714363853. The reversal of 18399714363749 is 94736341799381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14838635889025 + 3561078474724 = 3852095^2 + 1887082^2 .

It is a cyclic number.

It is not a de Polignac number, because 18399714363749 - 2²⁸ = 18399445928293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18399714363449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9199857181874 + 9199857181875.

It is an arithmetic number, because the mean of its divisors is an integer number (9199857181875).

Almost surely, 2^{18399714363749} is an apocalyptic number.

It is an amenable number.

18399714363749 is a deficient number, since it is larger than the sum of its proper divisors (1).

18399714363749 is an equidigital number, since it uses as much as digits as its factorization.

18399714363749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740710656, while the sum is 74.

The spelling of 18399714363749 in words is "eighteen trillion, three hundred ninety-nine billion, seven hundred fourteen million, three hundred sixty-three thousand, seven hundred forty-nine".