18400937909759 has 2 divisors, whose sum is σ = 18400937909760. Its totient is φ = 18400937909758.

The previous prime is 18400937909749. The next prime is 18400937909771. The reversal of 18400937909759 is 95790973900481.

It is a weak prime.

It is an emirp because it is prime and its reverse (95790973900481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18400937909759 - 2²⁰ = 18400936861183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18400937909692 and 18400937909701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18400937909749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9200468954879 + 9200468954880.

It is an arithmetic number, because the mean of its divisors is an integer number (9200468954880).

Almost surely, 2^{18400937909759} is an apocalyptic number.

18400937909759 is a deficient number, since it is larger than the sum of its proper divisors (1).

18400937909759 is an equidigital number, since it uses as much as digits as its factorization.

18400937909759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 154314720, while the sum is 71.

The spelling of 18400937909759 in words is "eighteen trillion, four hundred billion, nine hundred thirty-seven million, nine hundred nine thousand, seven hundred fifty-nine".