18115754009 has 2 divisors, whose sum is σ = 18115754010. Its totient is φ = 18115754008.

The previous prime is 18115753969. The next prime is 18115754089. The reversal of 18115754009 is 90045751181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18105048025 + 10705984 = 134555^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 18115754009 - 2¹⁶ = 18115688473 is a prime.

It is not a weakly prime, because it can be changed into another prime (18115754089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9057877004 + 9057877005.

It is an arithmetic number, because the mean of its divisors is an integer number (9057877005).

Almost surely, 2^18115754009 is an apocalyptic number.

It is an amenable number.

18115754009 is a deficient number, since it is larger than the sum of its proper divisors (1).

18115754009 is an equidigital number, since it uses as much as digits as its factorization.

18115754009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 41.

The spelling of 18115754009 in words is "eighteen billion, one hundred fifteen million, seven hundred fifty-four thousand, nine".