2778732763 has 2 divisors, whose sum is σ = 2778732764. Its totient is φ = 2778732762.

The previous prime is 2778732743. The next prime is 2778732779. The reversal of 2778732763 is 3672378772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2778732763 - 2⁹ = 2778732251 is a prime.

It is a super-2 number, since 2×2778732763² = 15442711536339228338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2778732763.

It is not a weakly prime, because it can be changed into another prime (2778732743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389366381 + 1389366382.

It is an arithmetic number, because the mean of its divisors is an integer number (1389366382).

Almost surely, 2^2778732763 is an apocalyptic number.

2778732763 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778732763 is an equidigital number, since it uses as much as digits as its factorization.

2778732763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 52.

The square root of 2778732763 is about 52713.6866762324. The cubic root of 2778732763 is about 1405.8821835250.

The spelling of 2778732763 in words is "two billion, seven hundred seventy-eight million, seven hundred thirty-two thousand, seven hundred sixty-three".