2780258899 has 4 divisors (see below), whose sum is σ = 3033009720. Its totient is φ = 2527508080.

The previous prime is 2780258861. The next prime is 2780258909. The reversal of 2780258899 is 9988520872.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2780258899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780258849) 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 3 ways as a sum of consecutive naturals, for example, 126375394 + ... + 126375415.

It is an arithmetic number, because the mean of its divisors is an integer number (758252430).

Almost surely, 2^2780258899 is an apocalyptic number.

2780258899 is a deficient number, since it is larger than the sum of its proper divisors (252750821).

2780258899 is a wasteful number, since it uses less digits than its factorization.

2780258899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252750820.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The square root of 2780258899 is about 52728.1603984057. The cubic root of 2780258899 is about 1406.1395160238.

The spelling of 2780258899 in words is "two billion, seven hundred eighty million, two hundred fifty-eight thousand, eight hundred ninety-nine".