81167795082 has 24 divisors (see below), whose sum is σ = 191851152480. Its totient is φ = 24596301480.

The previous prime is 81167795057. The next prime is 81167795083. The reversal of 81167795082 is 28059776118.

81167795082 is a `hidden beast` number, since 8 + 1 + 1 + 67 + 79 + 508 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (81167795083) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 204968982 + ... + 204969377.

It is an arithmetic number, because the mean of its divisors is an integer number (7993798020).

Almost surely, 2^81167795082 is an apocalyptic number.

81167795082 is an abundant number, since it is smaller than the sum of its proper divisors (110683357398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81167795082 is a wasteful number, since it uses less digits than its factorization.

81167795082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409938378 (or 409938375 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 81167795082 in words is "eighty-one billion, one hundred sixty-seven million, seven hundred ninety-five thousand, eighty-two".