81385141822 has 16 divisors (see below), whose sum is σ = 123209828352. Its totient is φ = 40315502080.

The previous prime is 81385141807. The next prime is 81385141853. The reversal of 81385141822 is 22814158318.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 471747 + ... + 620737.

It is an arithmetic number, because the mean of its divisors is an integer number (7700614272).

Almost surely, 2^81385141822 is an apocalyptic number.

81385141822 is a deficient number, since it is larger than the sum of its proper divisors (41824686530).

81385141822 is a wasteful number, since it uses less digits than its factorization.

81385141822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151523.

The product of its digits is 122880, while the sum is 43.

The spelling of 81385141822 in words is "eighty-one billion, three hundred eighty-five million, one hundred forty-one thousand, eight hundred twenty-two".