18044040757 has 2 divisors, whose sum is σ = 18044040758. Its totient is φ = 18044040756.

The previous prime is 18044040733. The next prime is 18044040779. The reversal of 18044040757 is 75704044081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12649725841 + 5394314916 = 112471^2 + 73446^2 .

It is a cyclic number.

It is not a de Polignac number, because 18044040757 - 2¹¹ = 18044038709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18044040257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022020378 + 9022020379.

It is an arithmetic number, because the mean of its divisors is an integer number (9022020379).

Almost surely, 2^18044040757 is an apocalyptic number.

It is an amenable number.

18044040757 is a deficient number, since it is larger than the sum of its proper divisors (1).

18044040757 is an equidigital number, since it uses as much as digits as its factorization.

18044040757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 40.

The spelling of 18044040757 in words is "eighteen billion, forty-four million, forty thousand, seven hundred fifty-seven".