8118821139 has 32 divisors (see below), whose sum is σ = 12848769024. Its totient is φ = 4495150080.

The previous prime is 8118821093. The next prime is 8118821149. The reversal of 8118821139 is 9311288118.

It is not a de Polignac number, because 8118821139 - 2¹² = 8118817043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8118821139.

It is not an unprimeable number, because it can be changed into a prime (8118821149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55939 + ... + 139164.

It is an arithmetic number, because the mean of its divisors is an integer number (401524032).

Almost surely, 2^8118821139 is an apocalyptic number.

8118821139 is a deficient number, since it is larger than the sum of its proper divisors (4729947885).

8118821139 is a wasteful number, since it uses less digits than its factorization.

8118821139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195227.

The product of its digits is 27648, while the sum is 42.

The square root of 8118821139 is about 90104.5012138683. The cubic root of 8118821139 is about 2009.8531396870.

The spelling of 8118821139 in words is "eight billion, one hundred eighteen million, eight hundred twenty-one thousand, one hundred thirty-nine".