81499795 has 16 divisors (see below), whose sum is σ = 105511392. Its totient is φ = 60076800.

The previous prime is 81499783. The next prime is 81499801. The reversal of 81499795 is 59799418.

It is not a de Polignac number, because 81499795 - 2⁵ = 81499763 is a prime.

It is a Duffinian number.

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, 67719 + ... + 68911.

It is an arithmetic number, because the mean of its divisors is an integer number (6594462).

Almost surely, 2^81499795 is an apocalyptic number.

81499795 is a deficient number, since it is larger than the sum of its proper divisors (24011597).

81499795 is a wasteful number, since it uses less digits than its factorization.

81499795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262.

The product of its digits is 816480, while the sum is 52.

The square root of 81499795 is about 9027.7236887269. The cubic root of 81499795 is about 433.5629594947.

The spelling of 81499795 in words is "eighty-one million, four hundred ninety-nine thousand, seven hundred ninety-five".