2778027505 has 12 divisors (see below), whose sum is σ = 3664242036. Its totient is φ = 2020383200.

The previous prime is 2778027503. The next prime is 2778027517. The reversal of 2778027505 is 5057208772.

It can be written as a sum of positive squares in 2 ways, for example, as 422672481 + 2355355024 = 20559^2 + 48532^2 .

It is not a de Polignac number, because 2778027505 - 2¹ = 2778027503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778027503) 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 11 ways as a sum of consecutive naturals, for example, 2295286 + ... + 2296495.

It is an arithmetic number, because the mean of its divisors is an integer number (305353503).

Almost surely, 2^2778027505 is an apocalyptic number.

It is an amenable number.

2778027505 is a deficient number, since it is larger than the sum of its proper divisors (886214531).

2778027505 is a wasteful number, since it uses less digits than its factorization.

2778027505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591808 (or 4591797 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 43.

The square root of 2778027505 is about 52706.9967366762. The cubic root of 2778027505 is about 1405.7632331932.

The spelling of 2778027505 in words is "two billion, seven hundred seventy-eight million, twenty-seven thousand, five hundred five".