2775643868 has 6 divisors (see below), whose sum is σ = 4857376776. Its totient is φ = 1387821932.

The previous prime is 2775643847. The next prime is 2775643889. The reversal of 2775643868 is 8683465772.

It is an interprime number because it is at equal distance from previous prime (2775643847) and next prime (2775643889).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346955480 + ... + 346955487.

It is an arithmetic number, because the mean of its divisors is an integer number (809562796).

Almost surely, 2^2775643868 is an apocalyptic number.

It is an amenable number.

2775643868 is a deficient number, since it is larger than the sum of its proper divisors (2081732908).

2775643868 is a wasteful number, since it uses less digits than its factorization.

2775643868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693910971 (or 693910969 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 56.

The square root of 2775643868 is about 52684.3797344146. The cubic root of 2775643868 is about 1405.3610547795.

The spelling of 2775643868 in words is "two billion, seven hundred seventy-five million, six hundred forty-three thousand, eight hundred sixty-eight".