2782138577833 has 4 divisors (see below), whose sum is σ = 2788746983428. Its totient is φ = 2775530172240.

The previous prime is 2782138577767. The next prime is 2782138577863. The reversal of 2782138577833 is 3387758312872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1426655858329 + 1355482719504 = 1194427^2 + 1164252^2 .

It is a cyclic number.

It is not a de Polignac number, because 2782138577833 - 2²¹ = 2782136480681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2782138577863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3304202166 + ... + 3304203007.

It is an arithmetic number, because the mean of its divisors is an integer number (697186745857).

Almost surely, 2^{2782138577833} is an apocalyptic number.

It is an amenable number.

2782138577833 is a deficient number, since it is larger than the sum of its proper divisors (6608405595).

2782138577833 is an equidigital number, since it uses as much as digits as its factorization.

2782138577833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608405594.

The product of its digits is 94832640, while the sum is 64.

The spelling of 2782138577833 in words is "two trillion, seven hundred eighty-two billion, one hundred thirty-eight million, five hundred seventy-seven thousand, eight hundred thirty-three".