81360894 has 8 divisors (see below), whose sum is σ = 162721800. Its totient is φ = 27120296.

The previous prime is 81360893. The next prime is 81360911. The reversal of 81360894 is 49806318.

It is a sphenic number, since it is the product of 3 distinct primes.

81360894 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81360893) 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 3 ways as a sum of consecutive naturals, for example, 6780069 + ... + 6780080.

It is an arithmetic number, because the mean of its divisors is an integer number (20340225).

Almost surely, 2^81360894 is an apocalyptic number.

81360894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81360894 is a wasteful number, since it uses less digits than its factorization.

81360894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13560154.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 81360894 is about 9020.0273835505. The cubic root of 81360894 is about 433.3165107210.

The spelling of 81360894 in words is "eighty-one million, three hundred sixty thousand, eight hundred ninety-four".