82644564 has 24 divisors (see below), whose sum is σ = 193015648. Its totient is φ = 27522720.

The previous prime is 82644559. The next prime is 82644593. The reversal of 82644564 is 46544628.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14079 + ... + 19065.

Almost surely, 2^82644564 is an apocalyptic number.

It is an amenable number.

82644564 is an abundant number, since it is smaller than the sum of its proper divisors (110371084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82644564 is a wasteful number, since it uses less digits than its factorization.

82644564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375 (or 6373 counting only the distinct ones).

The product of its digits is 184320, while the sum is 39.

The square root of 82644564 is about 9090.9055654539. The cubic root of 82644564 is about 435.5835107564.

The spelling of 82644564 in words is "eighty-two million, six hundred forty-four thousand, five hundred sixty-four".