2776681139 has 2 divisors, whose sum is σ = 2776681140. Its totient is φ = 2776681138.

The previous prime is 2776681121. The next prime is 2776681283. The reversal of 2776681139 is 9311866772.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2776681139 is a prime.

It is not a weakly prime, because it can be changed into another prime (2776684139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388340569 + 1388340570.

It is an arithmetic number, because the mean of its divisors is an integer number (1388340570).

Almost surely, 2^2776681139 is an apocalyptic number.

2776681139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2776681139 is an equidigital number, since it uses as much as digits as its factorization.

2776681139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The square root of 2776681139 is about 52694.2230135335. The cubic root of 2776681139 is about 1405.5360962936.

The spelling of 2776681139 in words is "two billion, seven hundred seventy-six million, six hundred eighty-one thousand, one hundred thirty-nine".