82640853 has 12 divisors (see below), whose sum is σ = 119516800. Its totient is φ = 55026216.

The previous prime is 82640851. The next prime is 82640867. The reversal of 82640853 is 35804628.

82640853 is a `hidden beast` number, since 8 + 2 + 640 + 8 + 5 + 3 = 666.

It is not a de Polignac number, because 82640853 - 2¹ = 82640851 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82640851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2748 + ... + 13146.

Almost surely, 2^82640853 is an apocalyptic number.

It is an amenable number.

82640853 is a deficient number, since it is larger than the sum of its proper divisors (36875947).

82640853 is a wasteful number, since it uses less digits than its factorization.

82640853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11288 (or 11285 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 82640853 is about 9090.7014580834. The cubic root of 82640853 is about 435.5769909705.

The spelling of 82640853 in words is "eighty-two million, six hundred forty thousand, eight hundred fifty-three".