2756275981 has 2 divisors, whose sum is σ = 2756275982. Its totient is φ = 2756275980.

The previous prime is 2756275939. The next prime is 2756275993. The reversal of 2756275981 is 1895726572.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2742093225 + 14182756 = 52365^2 + 3766^2 .

It is a cyclic number.

It is not a de Polignac number, because 2756275981 - 2⁷ = 2756275853 is a prime.

It is a super-2 number, since 2×2756275981² = 15194114566875024722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2756275931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1378137990 + 1378137991.

It is an arithmetic number, because the mean of its divisors is an integer number (1378137991).

Almost surely, 2^2756275981 is an apocalyptic number.

It is an amenable number.

2756275981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2756275981 is an equidigital number, since it uses as much as digits as its factorization.

2756275981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 52.

The square root of 2756275981 is about 52500.2474375121. The cubic root of 2756275981 is about 1402.0846462230.

The spelling of 2756275981 in words is "two billion, seven hundred fifty-six million, two hundred seventy-five thousand, nine hundred eighty-one".