40815371818 has 16 divisors (see below), whose sum is σ = 66916594080. Its totient is φ = 18556700976.

The previous prime is 40815371803. The next prime is 40815371819. The reversal of 40815371818 is 81817351804.

It is not an unprimeable number, because it can be changed into a prime (40815371819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11713348 + ... + 11716831.

It is an arithmetic number, because the mean of its divisors is an integer number (4182287130).

Almost surely, 2^40815371818 is an apocalyptic number.

40815371818 is a deficient number, since it is larger than the sum of its proper divisors (26101222262).

40815371818 is a wasteful number, since it uses less digits than its factorization.

40815371818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23430261.

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 40815371818 in words is "forty billion, eight hundred fifteen million, three hundred seventy-one thousand, eight hundred eighteen".