2778840563 has 8 divisors (see below), whose sum is σ = 2890073280. Its totient is φ = 2669509440.

The previous prime is 2778840551. The next prime is 2778840569. The reversal of 2778840563 is 3650488772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2778840563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778840569) 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 7 ways as a sum of consecutive naturals, for example, 472418 + ... + 478263.

It is an arithmetic number, because the mean of its divisors is an integer number (361259160).

Almost surely, 2^2778840563 is an apocalyptic number.

2778840563 is a deficient number, since it is larger than the sum of its proper divisors (111232717).

2778840563 is an equidigital number, since it uses as much as digits as its factorization.

2778840563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950797.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The square root of 2778840563 is about 52714.7091711602. The cubic root of 2778840563 is about 1405.9003635316.

The spelling of 2778840563 in words is "two billion, seven hundred seventy-eight million, eight hundred forty thousand, five hundred sixty-three".