81040118107 has 16 divisors (see below), whose sum is σ = 93322690272. Its totient is φ = 69708787200.

The previous prime is 81040118101. The next prime is 81040118111. The reversal of 81040118107 is 70181104018.

It is not a de Polignac number, because 81040118107 - 2⁷ = 81040117979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81040118101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1793013 + ... + 1837654.

It is an arithmetic number, because the mean of its divisors is an integer number (5832668142).

Almost surely, 2^81040118107 is an apocalyptic number.

81040118107 is a deficient number, since it is larger than the sum of its proper divisors (12282572165).

81040118107 is a wasteful number, since it uses less digits than its factorization.

81040118107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630798.

The product of its (nonzero) digits is 1792, while the sum is 31.

It can be divided in two parts, 8104011 and 8107, that added together give a palindrome (8112118).

The spelling of 81040118107 in words is "eighty-one billion, forty million, one hundred eighteen thousand, one hundred seven".