81160585 has 8 divisors (see below), whose sum is σ = 106246656. Its totient is φ = 59025840.

The previous prime is 81160529. The next prime is 81160603. The reversal of 81160585 is 58506118.

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

It is not a de Polignac number, because 81160585 - 2¹⁵ = 81127817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81160585.

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 7 ways as a sum of consecutive naturals, for example, 737769 + ... + 737878.

It is an arithmetic number, because the mean of its divisors is an integer number (13280832).

Almost surely, 2^81160585 is an apocalyptic number.

It is an amenable number.

81160585 is a deficient number, since it is larger than the sum of its proper divisors (25086071).

81160585 is a wasteful number, since it uses less digits than its factorization.

81160585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475663.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 81160585 is about 9008.9169715344. The cubic root of 81160585 is about 432.9606127735.

The spelling of 81160585 in words is "eighty-one million, one hundred sixty thousand, five hundred eighty-five".