2775138764 has 12 divisors (see below), whose sum is σ = 4860263688. Its totient is φ = 1386492000.

The previous prime is 2775138757. The next prime is 2775138881. The reversal of 2775138764 is 4678315772.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263537 + ... + 273864.

It is an arithmetic number, because the mean of its divisors is an integer number (405021974).

Almost surely, 2^2775138764 is an apocalyptic number.

It is an amenable number.

2775138764 is a deficient number, since it is larger than the sum of its proper divisors (2085124924).

2775138764 is a wasteful number, since it uses less digits than its factorization.

2775138764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538696 (or 538694 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 50.

The square root of 2775138764 is about 52679.5858374001. The cubic root of 2775138764 is about 1405.2758017010.

The spelling of 2775138764 in words is "two billion, seven hundred seventy-five million, one hundred thirty-eight thousand, seven hundred sixty-four".