243302811643 has 2 divisors, whose sum is σ = 243302811644. Its totient is φ = 243302811642.

The previous prime is 243302811623. The next prime is 243302811667. The reversal of 243302811643 is 346118203342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243302811643 - 2⁹ = 243302811131 is a prime.

It is not a weakly prime, because it can be changed into another prime (243302811623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121651405821 + 121651405822.

It is an arithmetic number, because the mean of its divisors is an integer number (121651405822).

Almost surely, 2^243302811643 is an apocalyptic number.

243302811643 is a deficient number, since it is larger than the sum of its proper divisors (1).

243302811643 is an equidigital number, since it uses as much as digits as its factorization.

243302811643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 243302811643 in words is "two hundred forty-three billion, three hundred two million, eight hundred eleven thousand, six hundred forty-three".