81932822605 has 32 divisors (see below), whose sum is σ = 106176821760. Its totient is φ = 60508842240.

The previous prime is 81932822579. The next prime is 81932822611. The reversal of 81932822605 is 50622823918.

It is a de Polignac number, because none of the positive numbers 2^k-81932822605 is a prime.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 12079315 + ... + 12086095.

It is an arithmetic number, because the mean of its divisors is an integer number (3318025680).

Almost surely, 2^81932822605 is an apocalyptic number.

It is an amenable number.

81932822605 is a deficient number, since it is larger than the sum of its proper divisors (24243999155).

81932822605 is a wasteful number, since it uses less digits than its factorization.

81932822605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10461.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 81932822605 in words is "eighty-one billion, nine hundred thirty-two million, eight hundred twenty-two thousand, six hundred five".