81826265 has 8 divisors (see below), whose sum is σ = 98249928. Its totient is φ = 65422080.

The previous prime is 81826247. The next prime is 81826271. The reversal of 81826265 is 56262818.

It can be written as a sum of positive squares in 4 ways, for example, as 38477209 + 43349056 = 6203^2 + 6584^2 .

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

It is not a de Polignac number, because 81826265 - 2¹⁸ = 81564121 is a prime.

It is a Duffinian 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, 7019 + ... + 14591.

It is an arithmetic number, because the mean of its divisors is an integer number (12281241).

Almost surely, 2^81826265 is an apocalyptic number.

It is an amenable number.

81826265 is a deficient number, since it is larger than the sum of its proper divisors (16423663).

81826265 is a wasteful number, since it uses less digits than its factorization.

81826265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9739.

The product of its digits is 46080, while the sum is 38.

The square root of 81826265 is about 9045.7871409845. The cubic root of 81826265 is about 434.1411070399.

The spelling of 81826265 in words is "eighty-one million, eight hundred twenty-six thousand, two hundred sixty-five".