2778725671 has 2 divisors, whose sum is σ = 2778725672. Its totient is φ = 2778725670.

The previous prime is 2778725647. The next prime is 2778725687. The reversal of 2778725671 is 1765278772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2778725671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778725171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389362835 + 1389362836.

It is an arithmetic number, because the mean of its divisors is an integer number (1389362836).

Almost surely, 2^2778725671 is an apocalyptic number.

2778725671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778725671 is an equidigital number, since it uses as much as digits as its factorization.

2778725671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304960, while the sum is 52.

The square root of 2778725671 is about 52713.6194071323. The cubic root of 2778725671 is about 1405.8809874733.

The spelling of 2778725671 in words is "two billion, seven hundred seventy-eight million, seven hundred twenty-five thousand, six hundred seventy-one".