81256095 has 16 divisors (see below), whose sum is σ = 144455520. Its totient is φ = 43336512.

The previous prime is 81256067. The next prime is 81256099. The reversal of 81256095 is 59065218.

It is a happy number.

81256095 is a `hidden beast` number, since 8 + 1 + 2 + 560 + 95 = 666.

It is not a de Polignac number, because 81256095 - 2⁹ = 81255583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81256099) 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 15 ways as a sum of consecutive naturals, for example, 300814 + ... + 301083.

It is an arithmetic number, because the mean of its divisors is an integer number (9028470).

Almost surely, 2^81256095 is an apocalyptic number.

81256095 is a deficient number, since it is larger than the sum of its proper divisors (63199425).

81256095 is a wasteful number, since it uses less digits than its factorization.

81256095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601911 (or 601905 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 81256095 is about 9014.2162720893. The cubic root of 81256095 is about 433.1303826096.

The spelling of 81256095 in words is "eighty-one million, two hundred fifty-six thousand, ninety-five".