818582808838 has 16 divisors (see below), whose sum is σ = 1284455239776. Its totient is φ = 390519817600.

The previous prime is 818582808779. The next prime is 818582808839. The reversal of 818582808838 is 838808285818.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818582808839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22170181 + ... + 22207072.

It is an arithmetic number, because the mean of its divisors is an integer number (80278452486).

Almost surely, 2^818582808838 is an apocalyptic number.

818582808838 is a deficient number, since it is larger than the sum of its proper divisors (465872430938).

818582808838 is a wasteful number, since it uses less digits than its factorization.

818582808838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44377679.

The product of its (nonzero) digits is 62914560, while the sum is 67.

The spelling of 818582808838 in words is "eight hundred eighteen billion, five hundred eighty-two million, eight hundred eight thousand, eight hundred thirty-eight".