243933257663 has 2 divisors, whose sum is σ = 243933257664. Its totient is φ = 243933257662.

The previous prime is 243933257629. The next prime is 243933257677. The reversal of 243933257663 is 366752339342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243933257663 - 2²² = 243929063359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243933257263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121966628831 + 121966628832.

It is an arithmetic number, because the mean of its divisors is an integer number (121966628832).

Almost surely, 2^243933257663 is an apocalyptic number.

243933257663 is a deficient number, since it is larger than the sum of its proper divisors (1).

243933257663 is an equidigital number, since it uses as much as digits as its factorization.

243933257663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 53.

The spelling of 243933257663 in words is "two hundred forty-three billion, nine hundred thirty-three million, two hundred fifty-seven thousand, six hundred sixty-three".