2740635809 has 2 divisors, whose sum is σ = 2740635810. Its totient is φ = 2740635808.

The previous prime is 2740635787. The next prime is 2740635811. The reversal of 2740635809 is 9085360472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1735555600 + 1005080209 = 41660^2 + 31703^2 .

It is a cyclic number.

It is not a de Polignac number, because 2740635809 - 2⁸ = 2740635553 is a prime.

It is a super-2 number, since 2×2740635809² = 15022169275146168962, which contains 22 as substring.

Together with 2740635811, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2740635809.

It is not a weakly prime, because it can be changed into another prime (2740635839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1370317904 + 1370317905.

It is an arithmetic number, because the mean of its divisors is an integer number (1370317905).

Almost surely, 2^2740635809 is an apocalyptic number.

It is an amenable number.

2740635809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2740635809 is an equidigital number, since it uses as much as digits as its factorization.

2740635809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 2740635809 is about 52351.0822142198. The cubic root of 2740635809 is about 1399.4276246957.

The spelling of 2740635809 in words is "two billion, seven hundred forty million, six hundred thirty-five thousand, eight hundred nine".