2780775249 has 16 divisors (see below), whose sum is σ = 4240037760. Its totient is φ = 1588014720.

The previous prime is 2780775247. The next prime is 2780775251. The reversal of 2780775249 is 9425770872.

It is an interprime number because it is at equal distance from previous prime (2780775247) and next prime (2780775251).

It is not a de Polignac number, because 2780775249 - 2¹ = 2780775247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2780775247) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6804 + ... + 74885.

It is an arithmetic number, because the mean of its divisors is an integer number (265002360).

Almost surely, 2^2780775249 is an apocalyptic number.

It is an amenable number.

2780775249 is a deficient number, since it is larger than the sum of its proper divisors (1459262511).

2780775249 is a wasteful number, since it uses less digits than its factorization.

2780775249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83320.

The product of its (nonzero) digits is 1975680, while the sum is 51.

The square root of 2780775249 is about 52733.0565110728. The cubic root of 2780775249 is about 1406.2265600992.

The spelling of 2780775249 in words is "two billion, seven hundred eighty million, seven hundred seventy-five thousand, two hundred forty-nine".