540453335209 has 2 divisors, whose sum is σ = 540453335210. Its totient is φ = 540453335208.

The previous prime is 540453335207. The next prime is 540453335243. The reversal of 540453335209 is 902533354045.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331355653225 + 209097681984 = 575635^2 + 457272^2 .

It is a cyclic number.

It is not a de Polignac number, because 540453335209 - 2¹ = 540453335207 is a prime.

Together with 540453335207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (540453335207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270226667604 + 270226667605.

It is an arithmetic number, because the mean of its divisors is an integer number (270226667605).

Almost surely, 2^540453335209 is an apocalyptic number.

It is an amenable number.

540453335209 is a deficient number, since it is larger than the sum of its proper divisors (1).

540453335209 is an equidigital number, since it uses as much as digits as its factorization.

540453335209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 540453335209 in words is "five hundred forty billion, four hundred fifty-three million, three hundred thirty-five thousand, two hundred nine".