81500795 has 4 divisors (see below), whose sum is σ = 97800960. Its totient is φ = 65200632.

The previous prime is 81500761. The next prime is 81500801. The reversal of 81500795 is 59700518.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59700518 = 2 ⋅29850259.

It is a cyclic number.

It is not a de Polignac number, because 81500795 - 2¹⁴ = 81484411 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8150075 + ... + 8150084.

It is an arithmetic number, because the mean of its divisors is an integer number (24450240).

Almost surely, 2^81500795 is an apocalyptic number.

81500795 is a deficient number, since it is larger than the sum of its proper divisors (16300165).

81500795 is a wasteful number, since it uses less digits than its factorization.

81500795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16300164.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 81500795 is about 9027.7790735042. The cubic root of 81500795 is about 433.5647327555.

The spelling of 81500795 in words is "eighty-one million, five hundred thousand, seven hundred ninety-five".