2778560263 has 4 divisors (see below), whose sum is σ = 2782855440. Its totient is φ = 2774265088.

The previous prime is 2778560261. The next prime is 2778560269. The reversal of 2778560263 is 3620658772.

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

It is a cyclic number.

It is not a de Polignac number, because 2778560263 - 2¹ = 2778560261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778560261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146618 + ... + 2147911.

It is an arithmetic number, because the mean of its divisors is an integer number (695713860).

Almost surely, 2^2778560263 is an apocalyptic number.

2778560263 is a deficient number, since it is larger than the sum of its proper divisors (4295177).

2778560263 is an equidigital number, since it uses as much as digits as its factorization.

2778560263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295176.

The product of its (nonzero) digits is 846720, while the sum is 46.

The square root of 2778560263 is about 52712.0504533830. The cubic root of 2778560263 is about 1405.8530911634.

The spelling of 2778560263 in words is "two billion, seven hundred seventy-eight million, five hundred sixty thousand, two hundred sixty-three".