18049180769 has 2 divisors, whose sum is σ = 18049180770. Its totient is φ = 18049180768.

The previous prime is 18049180733. The next prime is 18049180817. The reversal of 18049180769 is 96708194081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12163222369 + 5885958400 = 110287^2 + 76720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18049180769 is a prime.

It is a super-2 number, since 2×18049180769² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18049180769.

It is not a weakly prime, because it can be changed into another prime (18049183769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9024590384 + 9024590385.

It is an arithmetic number, because the mean of its divisors is an integer number (9024590385).

Almost surely, 2^18049180769 is an apocalyptic number.

It is an amenable number.

18049180769 is a deficient number, since it is larger than the sum of its proper divisors (1).

18049180769 is an equidigital number, since it uses as much as digits as its factorization.

18049180769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 18049180769 in words is "eighteen billion, forty-nine million, one hundred eighty thousand, seven hundred sixty-nine".