81760269 has 16 divisors (see below), whose sum is σ = 112285440. Its totient is φ = 52879680.

The previous prime is 81760247. The next prime is 81760271. The reversal of 81760269 is 96206718.

It is not a de Polignac number, because 81760269 - 2⁸ = 81760013 is a prime.

It is a super-2 number, since 2×81760269² = 13369483173904722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81760169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46987 + ... + 48695.

It is an arithmetic number, because the mean of its divisors is an integer number (7017840).

Almost surely, 2^81760269 is an apocalyptic number.

It is an amenable number.

81760269 is a deficient number, since it is larger than the sum of its proper divisors (30525171).

81760269 is a wasteful number, since it uses less digits than its factorization.

81760269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 81760269 is about 9042.1385191779. The cubic root of 81760269 is about 434.0243585329.

The spelling of 81760269 in words is "eighty-one million, seven hundred sixty thousand, two hundred sixty-nine".