78322533818 has 16 divisors (see below), whose sum is σ = 123684681120. Its totient is φ = 37094890896.

The previous prime is 78322533797. The next prime is 78322533829. The reversal of 78322533818 is 81833522387.

It is a happy number.

It is a super-2 number, since 2×78322533818² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132605 + ... + 417407.

It is an arithmetic number, because the mean of its divisors is an integer number (7730292570).

Almost surely, 2^78322533818 is an apocalyptic number.

78322533818 is a deficient number, since it is larger than the sum of its proper divisors (45362147302).

78322533818 is a wasteful number, since it uses less digits than its factorization.

78322533818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292061.

The product of its digits is 1935360, while the sum is 50.

The spelling of 78322533818 in words is "seventy-eight billion, three hundred twenty-two million, five hundred thirty-three thousand, eight hundred eighteen".