81811926322 has 16 divisors (see below), whose sum is σ = 140269026240. Its totient is φ = 35057251728.

The previous prime is 81811926311. The next prime is 81811926331. The reversal of 81811926322 is 22362911818.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314368 + ... + 512299.

It is an arithmetic number, because the mean of its divisors is an integer number (8766814140).

Almost surely, 2^81811926322 is an apocalyptic number.

81811926322 is a deficient number, since it is larger than the sum of its proper divisors (58457099918).

81811926322 is a wasteful number, since it uses less digits than its factorization.

81811926322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833745.

The product of its digits is 82944, while the sum is 43.

The spelling of 81811926322 in words is "eighty-one billion, eight hundred eleven million, nine hundred twenty-six thousand, three hundred twenty-two".