13815040718138 has 8 divisors (see below), whose sum is σ = 22606430266080. Its totient is φ = 6279563962780.

The previous prime is 13815040718131. The next prime is 13815040718147. The reversal of 13815040718138 is 83181704051831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13815040718131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313978198118 + ... + 313978198161.

It is an arithmetic number, because the mean of its divisors is an integer number (2825803783260).

Almost surely, 2^{13815040718138} is an apocalyptic number.

13815040718138 is a deficient number, since it is larger than the sum of its proper divisors (8791389547942).

13815040718138 is a wasteful number, since it uses less digits than its factorization.

13815040718138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627956396292.

The product of its (nonzero) digits is 645120, while the sum is 50.

Adding to 13815040718138 its reverse (83181704051831), we get a palindrome (96996744769969).

The spelling of 13815040718138 in words is "thirteen trillion, eight hundred fifteen billion, forty million, seven hundred eighteen thousand, one hundred thirty-eight".