243540454063 has 2 divisors, whose sum is σ = 243540454064. Its totient is φ = 243540454062.

The previous prime is 243540454061. The next prime is 243540454081. The reversal of 243540454063 is 360454045342.

243540454063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243540454063 - 2¹ = 243540454061 is a prime.

It is a super-3 number, since 3×243540454063³ (a number of 35 digits) contains 333 as substring.

Together with 243540454061, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243540454061) 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, 121770227031 + 121770227032.

It is an arithmetic number, because the mean of its divisors is an integer number (121770227032).

Almost surely, 2^243540454063 is an apocalyptic number.

243540454063 is a deficient number, since it is larger than the sum of its proper divisors (1).

243540454063 is an equidigital number, since it uses as much as digits as its factorization.

243540454063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 40.

The spelling of 243540454063 in words is "two hundred forty-three billion, five hundred forty million, four hundred fifty-four thousand, sixty-three".