81163495 has 8 divisors (see below), whose sum is σ = 111309984. Its totient is φ = 55654944.

The previous prime is 81163483. The next prime is 81163513. The reversal of 81163495 is 59436118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81163495 - 2⁵ = 81163463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1159444 + ... + 1159513.

It is an arithmetic number, because the mean of its divisors is an integer number (13913748).

Almost surely, 2^81163495 is an apocalyptic number.

81163495 is a deficient number, since it is larger than the sum of its proper divisors (30146489).

81163495 is a wasteful number, since it uses less digits than its factorization.

81163495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318969.

The product of its digits is 25920, while the sum is 37.

The square root of 81163495 is about 9009.0784767367. The cubic root of 81163495 is about 432.9657872898.

It can be divided in two parts, 8116 and 3495, that added together give a palindrome (11611).

The spelling of 81163495 in words is "eighty-one million, one hundred sixty-three thousand, four hundred ninety-five".