816628807226 has 32 divisors (see below), whose sum is σ = 1260481824000. Its totient is φ = 396559179520.

The previous prime is 816628807217. The next prime is 816628807249. The reversal of 816628807226 is 622708826618.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91106621 + ... + 91115583.

It is an arithmetic number, because the mean of its divisors is an integer number (39390057000).

Almost surely, 2^816628807226 is an apocalyptic number.

816628807226 is a deficient number, since it is larger than the sum of its proper divisors (443853016774).

816628807226 is a wasteful number, since it uses less digits than its factorization.

816628807226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13894.

The product of its (nonzero) digits is 6193152, while the sum is 56.

It can be divided in two parts, 81662 and 8807226, that added together give a palindrome (8888888).

The spelling of 816628807226 in words is "eight hundred sixteen billion, six hundred twenty-eight million, eight hundred seven thousand, two hundred twenty-six".