81014065 has 16 divisors (see below), whose sum is σ = 106827840. Its totient is φ = 58489920.

The previous prime is 81014033. The next prime is 81014071. The reversal of 81014065 is 56041018.

It is not a de Polignac number, because 81014065 - 2⁵ = 81014033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2347 + ... + 12943.

It is an arithmetic number, because the mean of its divisors is an integer number (6676740).

Almost surely, 2^81014065 is an apocalyptic number.

It is an amenable number.

81014065 is a deficient number, since it is larger than the sum of its proper divisors (25813775).

81014065 is a wasteful number, since it uses less digits than its factorization.

81014065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10752.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 81014065 is about 9000.7813549714. The cubic root of 81014065 is about 432.6999131493.

The spelling of 81014065 in words is "eighty-one million, fourteen thousand, sixty-five".