2780000305249 has 4 divisors (see below), whose sum is σ = 2786797372420. Its totient is φ = 2773203238080.

The previous prime is 2780000305211. The next prime is 2780000305259. The reversal of 2780000305249 is 9425030000872.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1628227040400 + 1151773264849 = 1276020^2 + 1073207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2780000305249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780000305259) 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, 3398532972 + ... + 3398533789.

It is an arithmetic number, because the mean of its divisors is an integer number (696699343105).

Almost surely, 2^{2780000305249} is an apocalyptic number.

It is an amenable number.

2780000305249 is a deficient number, since it is larger than the sum of its proper divisors (6797067171).

2780000305249 is an equidigital number, since it uses as much as digits as its factorization.

2780000305249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6797067170.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 2780000305249 in words is "two trillion, seven hundred eighty billion, three hundred five thousand, two hundred forty-nine".