82028028660885 has 24 divisors (see below), whose sum is σ = 142519640645304. Its totient is φ = 43644366783360.

The previous prime is 82028028660883. The next prime is 82028028660911. The reversal of 82028028660885 is 58806682082028.

It can be written as a sum of positive squares in 4 ways, for example, as 9670650794289 + 72357377866596 = 3109767^2 + 8506314^2 .

It is not a de Polignac number, because 82028028660885 - 2¹ = 82028028660883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82028028660883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2164880202 + ... + 2164918091.

It is an arithmetic number, because the mean of its divisors is an integer number (5938318360221).

Almost surely, 2^{82028028660885} is an apocalyptic number.

It is an amenable number.

82028028660885 is a deficient number, since it is larger than the sum of its proper divisors (60491611984419).

82028028660885 is a wasteful number, since it uses less digits than its factorization.

82028028660885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329798725 (or 4329798722 counting only the distinct ones).

The product of its (nonzero) digits is 47185920, while the sum is 63.

The spelling of 82028028660885 in words is "eighty-two trillion, twenty-eight billion, twenty-eight million, six hundred sixty thousand, eight hundred eighty-five".