81085176 has 48 divisors (see below), whose sum is σ = 220287600. Its totient is φ = 26944512.

The previous prime is 81085163. The next prime is 81085183. The reversal of 81085176 is 67158018.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 81085176.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 24280 + ... + 27416.

It is an arithmetic number, because the mean of its divisors is an integer number (4589325).

Almost surely, 2^81085176 is an apocalyptic number.

It is an amenable number.

81085176 is an abundant number, since it is smaller than the sum of its proper divisors (139202424).

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

81085176 is a wasteful number, since it uses less digits than its factorization.

81085176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508 (or 3501 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 81085176 is about 9004.7307566634. The cubic root of 81085176 is about 432.8264785182.

The spelling of 81085176 in words is "eighty-one million, eighty-five thousand, one hundred seventy-six".