81715795 has 32 divisors (see below), whose sum is σ = 116553600. Its totient is φ = 53830656.

The previous prime is 81715763. The next prime is 81715841. The reversal of 81715795 is 59751718.

It is a cyclic number.

It is not a de Polignac number, because 81715795 - 2⁵ = 81715763 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114901 + ... + 115609.

It is an arithmetic number, because the mean of its divisors is an integer number (3642300).

Almost surely, 2^81715795 is an apocalyptic number.

81715795 is a deficient number, since it is larger than the sum of its proper divisors (34837805).

81715795 is a wasteful number, since it uses less digits than its factorization.

81715795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847.

The product of its digits is 88200, while the sum is 43.

The square root of 81715795 is about 9039.6789212892. The cubic root of 81715795 is about 433.9456475217.

The spelling of 81715795 in words is "eighty-one million, seven hundred fifteen thousand, seven hundred ninety-five".