40844556818 has 32 divisors (see below), whose sum is σ = 66341358720. Its totient is φ = 18748224000.

The previous prime is 40844556811. The next prime is 40844556827. The reversal of 40844556818 is 81865544804.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 40844556818.

It is not an unprimeable number, because it can be changed into a prime (40844556811) 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, 4740098 + ... + 4748706.

It is an arithmetic number, because the mean of its divisors is an integer number (2073167460).

Almost surely, 2^40844556818 is an apocalyptic number.

40844556818 is a deficient number, since it is larger than the sum of its proper divisors (25496801902).

40844556818 is a wasteful number, since it uses less digits than its factorization.

40844556818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9602.

The product of its (nonzero) digits is 4915200, while the sum is 53.

The spelling of 40844556818 in words is "forty billion, eight hundred forty-four million, five hundred fifty-six thousand, eight hundred eighteen".