82564785 has 32 divisors (see below), whose sum is σ = 154512000. Its totient is φ = 41715648.

The previous prime is 82564753. The next prime is 82564789. The reversal of 82564785 is 58746528.

82564785 is a `hidden beast` number, since 8 + 2 + 564 + 7 + 85 = 666.

It is not a de Polignac number, because 82564785 - 2⁵ = 82564753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 82564785.

It is not an unprimeable number, because it can be changed into a prime (82564789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13530 + ... + 18659.

It is an arithmetic number, because the mean of its divisors is an integer number (4828500).

Almost surely, 2^82564785 is an apocalyptic number.

It is an amenable number.

82564785 is a deficient number, since it is larger than the sum of its proper divisors (71947215).

82564785 is a wasteful number, since it uses less digits than its factorization.

82564785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32222 (or 32216 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 82564785 is about 9086.5166593145. The cubic root of 82564785 is about 435.4433055086.

It can be divided in two parts, 8256 and 4785, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 82564785 in words is "eighty-two million, five hundred sixty-four thousand, seven hundred eighty-five".