82780575580025 has 6 divisors (see below), whose sum is σ = 102647913719262. Its totient is φ = 66224460464000.

The previous prime is 82780575580019. The next prime is 82780575580093. The reversal of 82780575580025 is 52008557508728.

It can be written as a sum of positive squares in 3 ways, for example, as 6247840186624 + 76532735393401 = 2499568^2 + 8748299^2 .

It is not a de Polignac number, because 82780575580025 - 2⁸ = 82780575579769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82780575580025.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1655611511576 + ... + 1655611511625.

It is an arithmetic number, because the mean of its divisors is an integer number (17107985619877).

Almost surely, 2^{82780575580025} is an apocalyptic number.

It is an amenable number.

82780575580025 is a deficient number, since it is larger than the sum of its proper divisors (19867338139237).

82780575580025 is a wasteful number, since it uses less digits than its factorization.

82780575580025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311223023211 (or 3311223023206 counting only the distinct ones).

The product of its (nonzero) digits is 62720000, while the sum is 62.

The spelling of 82780575580025 in words is "eighty-two trillion, seven hundred eighty billion, five hundred seventy-five million, five hundred eighty thousand, twenty-five".