118638133109 has 2 divisors, whose sum is σ = 118638133110. Its totient is φ = 118638133108.

The previous prime is 118638133067. The next prime is 118638133171. The reversal of 118638133109 is 901331836811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98175688900 + 20462444209 = 313330^2 + 143047^2 .

It is a cyclic number.

It is not a de Polignac number, because 118638133109 - 2²⁴ = 118621355893 is a prime.

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 118638133109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118638133409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59319066554 + 59319066555.

It is an arithmetic number, because the mean of its divisors is an integer number (59319066555).

Almost surely, 2^118638133109 is an apocalyptic number.

It is an amenable number.

118638133109 is a deficient number, since it is larger than the sum of its proper divisors (1).

118638133109 is an equidigital number, since it uses as much as digits as its factorization.

118638133109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 118638133109 in words is "one hundred eighteen billion, six hundred thirty-eight million, one hundred thirty-three thousand, one hundred nine".