3118180136509 has 4 divisors (see below), whose sum is σ = 3118522464220. Its totient is φ = 3117837808800.

The previous prime is 3118180136447. The next prime is 3118180136521. The reversal of 3118180136509 is 9056310818113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1937650080025 + 1180530056484 = 1391995^2 + 1086522^2 .

It is a cyclic number.

It is not a de Polignac number, because 3118180136509 - 2²⁷ = 3118045918781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3118180136909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171150192 + ... + 171168409.

It is an arithmetic number, because the mean of its divisors is an integer number (779630616055).

Almost surely, 2^{3118180136509} is an apocalyptic number.

It is an amenable number.

3118180136509 is a deficient number, since it is larger than the sum of its proper divisors (342327711).

3118180136509 is an equidigital number, since it uses as much as digits as its factorization.

3118180136509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342327710.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 3118180136509 in words is "three trillion, one hundred eighteen billion, one hundred eighty million, one hundred thirty-six thousand, five hundred nine".