81075833176 has 64 divisors (see below), whose sum is σ = 167136631200. Its totient is φ = 36641538048.

The previous prime is 81075833143. The next prime is 81075833183. The reversal of 81075833176 is 67133857018.

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 15 ways as a sum of consecutive naturals, for example, 1551246 + ... + 1602658.

Almost surely, 2^81075833176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81075833176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83568315600).

81075833176 is an abundant number, since it is smaller than the sum of its proper divisors (86060798024).

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

81075833176 is a wasteful number, since it uses less digits than its factorization.

81075833176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51748 (or 51744 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 81075833176 in words is "eighty-one billion, seventy-five million, eight hundred thirty-three thousand, one hundred seventy-six".