2773868413649 has 4 divisors (see below), whose sum is σ = 2780650488420. Its totient is φ = 2767086338880.

The previous prime is 2773868413639. The next prime is 2773868413709. The reversal of 2773868413649 is 9463148683772.

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 2273481949249 + 500386464400 = 1507807^2 + 707380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2773868413649 - 2³⁶ = 2705148936913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2773868413639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3391036772 + ... + 3391037589.

It is an arithmetic number, because the mean of its divisors is an integer number (695162622105).

Almost surely, 2^{2773868413649} is an apocalyptic number.

It is an amenable number.

2773868413649 is a deficient number, since it is larger than the sum of its proper divisors (6782074771).

2773868413649 is an equidigital number, since it uses as much as digits as its factorization.

2773868413649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6782074770.

The product of its digits is 292626432, while the sum is 68.

The spelling of 2773868413649 in words is "two trillion, seven hundred seventy-three billion, eight hundred sixty-eight million, four hundred thirteen thousand, six hundred forty-nine".