2756856139 has 2 divisors, whose sum is σ = 2756856140. Its totient is φ = 2756856138.

The previous prime is 2756856077. The next prime is 2756856161. The reversal of 2756856139 is 9316586572.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2756856139 is a prime.

It is a super-2 number, since 2×2756856139² = 15200511542283974642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2756826139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1378428069 + 1378428070.

It is an arithmetic number, because the mean of its divisors is an integer number (1378428070).

Almost surely, 2^2756856139 is an apocalyptic number.

2756856139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2756856139 is an equidigital number, since it uses as much as digits as its factorization.

2756856139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 52.

The square root of 2756856139 is about 52505.7724350380. The cubic root of 2756856139 is about 1402.1830124684.

The spelling of 2756856139 in words is "two billion, seven hundred fifty-six million, eight hundred fifty-six thousand, one hundred thirty-nine".