82785868844 has 24 divisors (see below), whose sum is σ = 165602707200. Its totient is φ = 35473021776.

The previous prime is 82785868843. The next prime is 82785868849. The reversal of 82785868844 is 44886858728.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (82785868843) 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, 122642 + ... + 424985.

It is an arithmetic number, because the mean of its divisors is an integer number (6900112800).

Almost surely, 2^82785868844 is an apocalyptic number.

It is an amenable number.

82785868844 is an abundant number, since it is smaller than the sum of its proper divisors (82816838356).

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

82785868844 is a wasteful number, since it uses less digits than its factorization.

82785868844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553037 (or 553035 counting only the distinct ones).

The product of its digits is 220200960, while the sum is 68.

The spelling of 82785868844 in words is "eighty-two billion, seven hundred eighty-five million, eight hundred sixty-eight thousand, eight hundred forty-four".