81092822792 has 32 divisors (see below), whose sum is σ = 158953337280. Its totient is φ = 38711787840.

The previous prime is 81092822773. The next prime is 81092822801. The reversal of 81092822792 is 29722829018.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 81092822792.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307778 + ... + 506865.

It is an arithmetic number, because the mean of its divisors is an integer number (4967291790).

Almost surely, 2^81092822792 is an apocalyptic number.

It is an amenable number.

81092822792 is a deficient number, since it is larger than the sum of its proper divisors (77860514488).

81092822792 is a wasteful number, since it uses less digits than its factorization.

81092822792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815213 (or 815209 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 81092822792 in words is "eighty-one billion, ninety-two million, eight hundred twenty-two thousand, seven hundred ninety-two".