275781080749 has 2 divisors, whose sum is σ = 275781080750. Its totient is φ = 275781080748.

The previous prime is 275781080747. The next prime is 275781080761. The reversal of 275781080749 is 947080187572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275005848100 + 775232649 = 524410^2 + 27843^2 .

It is a cyclic number.

It is not a de Polignac number, because 275781080749 - 2¹ = 275781080747 is a prime.

Together with 275781080747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 275781080693 and 275781080702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275781080747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137890540374 + 137890540375.

It is an arithmetic number, because the mean of its divisors is an integer number (137890540375).

Almost surely, 2^275781080749 is an apocalyptic number.

It is an amenable number.

275781080749 is a deficient number, since it is larger than the sum of its proper divisors (1).

275781080749 is an equidigital number, since it uses as much as digits as its factorization.

275781080749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7902720, while the sum is 58.

The spelling of 275781080749 in words is "two hundred seventy-five billion, seven hundred eighty-one million, eighty thousand, seven hundred forty-nine".