2777045891 has 2 divisors, whose sum is σ = 2777045892. Its totient is φ = 2777045890.

The previous prime is 2777045879. The next prime is 2777045893. The reversal of 2777045891 is 1985407772.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2777045891 is a prime.

It is a Sophie Germain prime.

Together with 2777045893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2777045893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388522945 + 1388522946.

It is an arithmetic number, because the mean of its divisors is an integer number (1388522946).

Almost surely, 2^2777045891 is an apocalyptic number.

2777045891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2777045891 is an equidigital number, since it uses as much as digits as its factorization.

2777045891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 987840, while the sum is 50.

The square root of 2777045891 is about 52697.6839244383. The cubic root of 2777045891 is about 1405.5976385485.

The spelling of 2777045891 in words is "two billion, seven hundred seventy-seven million, forty-five thousand, eight hundred ninety-one".