82563819644 has 24 divisors (see below), whose sum is σ = 146493217920. Its totient is φ = 40708825344.

The previous prime is 82563819617. The next prime is 82563819649. The reversal of 82563819644 is 44691836528.

It is a self number, because there is not a number n which added to its sum of digits gives 82563819644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82563819649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1750037 + ... + 1796595.

It is an arithmetic number, because the mean of its divisors is an integer number (6103884080).

Almost surely, 2^82563819644 is an apocalyptic number.

It is an amenable number.

82563819644 is a deficient number, since it is larger than the sum of its proper divisors (63929398276).

82563819644 is a wasteful number, since it uses less digits than its factorization.

82563819644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52709 (or 52707 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 56.

The spelling of 82563819644 in words is "eighty-two billion, five hundred sixty-three million, eight hundred nineteen thousand, six hundred forty-four".