2772161138 has 16 divisors (see below), whose sum is σ = 4343016960. Its totient is φ = 1325758896.

The previous prime is 2772161129. The next prime is 2772161141. The reversal of 2772161138 is 8311612772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313106 + ... + 321837.

It is an arithmetic number, because the mean of its divisors is an integer number (271438560).

Almost surely, 2^2772161138 is an apocalyptic number.

2772161138 is a deficient number, since it is larger than the sum of its proper divisors (1570855822).

2772161138 is a wasteful number, since it uses less digits than its factorization.

2772161138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635041.

The product of its digits is 28224, while the sum is 38.

The square root of 2772161138 is about 52651.3165837285. The cubic root of 2772161138 is about 1404.7730180471.

The spelling of 2772161138 in words is "two billion, seven hundred seventy-two million, one hundred sixty-one thousand, one hundred thirty-eight".