8118431137 has 4 divisors (see below), whose sum is σ = 8126306496. Its totient is φ = 8110555780.

The previous prime is 8118431059. The next prime is 8118431143. The reversal of 8118431137 is 7311348118.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8118431137 is a prime.

It is a super-2 number, since 2×8118431137² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8118431096 and 8118431105.

It is not an unprimeable number, because it can be changed into a prime (8118431837) 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, 3936133 + ... + 3938194.

It is an arithmetic number, because the mean of its divisors is an integer number (2031576624).

Almost surely, 2^8118431137 is an apocalyptic number.

It is an amenable number.

8118431137 is a deficient number, since it is larger than the sum of its proper divisors (7875359).

8118431137 is a wasteful number, since it uses less digits than its factorization.

8118431137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7875358.

The product of its digits is 16128, while the sum is 37.

The square root of 8118431137 is about 90102.3370229652. The cubic root of 8118431137 is about 2009.8209568827.

The spelling of 8118431137 in words is "eight billion, one hundred eighteen million, four hundred thirty-one thousand, one hundred thirty-seven".