275780740747909 has 4 divisors (see below), whose sum is σ = 275794733397420. Its totient is φ = 275766748098400.

The previous prime is 275780740747907. The next prime is 275780740748063. The reversal of 275780740747909 is 909747047087572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143710585564225 + 132070155183684 = 11987935^2 + 11492178^2 .

It is a cyclic number.

It is not a de Polignac number, because 275780740747909 - 2¹ = 275780740747907 is a prime.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275780740747907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6996295192 + ... + 6996334609.

It is an arithmetic number, because the mean of its divisors is an integer number (68948683349355).

Almost surely, 2^{275780740747909} is an apocalyptic number.

It is an amenable number.

275780740747909 is a deficient number, since it is larger than the sum of its proper divisors (13992649511).

275780740747909 is a wasteful number, since it uses less digits than its factorization.

275780740747909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13992649510.

The product of its (nonzero) digits is 1742549760, while the sum is 76.

The spelling of 275780740747909 in words is "two hundred seventy-five trillion, seven hundred eighty billion, seven hundred forty million, seven hundred forty-seven thousand, nine hundred nine".