18478800743729 has 2 divisors, whose sum is σ = 18478800743730. Its totient is φ = 18478800743728.

The previous prime is 18478800743717. The next prime is 18478800743791. The reversal of 18478800743729 is 92734700887481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10237440160000 + 8241360583729 = 3199600^2 + 2870777^2 .

It is a cyclic number.

It is not a de Polignac number, because 18478800743729 - 2²⁸ = 18478532308273 is a prime.

It is not a weakly prime, because it can be changed into another prime (18978800743729) 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, 9239400371864 + 9239400371865.

It is an arithmetic number, because the mean of its divisors is an integer number (9239400371865).

Almost surely, 2^{18478800743729} is an apocalyptic number.

It is an amenable number.

18478800743729 is a deficient number, since it is larger than the sum of its proper divisors (1).

18478800743729 is an equidigital number, since it uses as much as digits as its factorization.

18478800743729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151732224, while the sum is 68.

The spelling of 18478800743729 in words is "eighteen trillion, four hundred seventy-eight billion, eight hundred million, seven hundred forty-three thousand, seven hundred twenty-nine".