82000643825 has 12 divisors (see below), whose sum is σ = 101776485888. Its totient is φ = 65538781200.

The previous prime is 82000643801. The next prime is 82000643833. The reversal of 82000643825 is 52834600028.

It is a de Polignac number, because none of the positive numbers 2^k-82000643825 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1516241 + ... + 1569390.

It is an arithmetic number, because the mean of its divisors is an integer number (8481373824).

Almost surely, 2^82000643825 is an apocalyptic number.

It is an amenable number.

82000643825 is a deficient number, since it is larger than the sum of its proper divisors (19775842063).

82000643825 is a wasteful number, since it uses less digits than its factorization.

82000643825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086704 (or 3086699 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 82000643825 in words is "eighty-two billion, six hundred forty-three thousand, eight hundred twenty-five".