13818395137 has 4 divisors (see below), whose sum is σ = 13821009156. Its totient is φ = 13815781120.

The previous prime is 13818395089. The next prime is 13818395159. The reversal of 13818395137 is 73159381831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73159381831 = 7417 ⋅9863743.

It can be written as a sum of positive squares in 2 ways, for example, as 6889664016 + 6928731121 = 83004^2 + 83239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13818395137 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13818395197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299064 + ... + 1309657.

It is an arithmetic number, because the mean of its divisors is an integer number (3455252289).

Almost surely, 2^13818395137 is an apocalyptic number.

It is an amenable number.

13818395137 is a deficient number, since it is larger than the sum of its proper divisors (2614019).

13818395137 is an equidigital number, since it uses as much as digits as its factorization.

13818395137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614018.

The product of its digits is 544320, while the sum is 49.

The spelling of 13818395137 in words is "thirteen billion, eight hundred eighteen million, three hundred ninety-five thousand, one hundred thirty-seven".