201864555943 has 2 divisors, whose sum is σ = 201864555944. Its totient is φ = 201864555942.

The previous prime is 201864555941. The next prime is 201864556013. The reversal of 201864555943 is 349555468102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201864555943 - 2¹ = 201864555941 is a prime.

Together with 201864555941, 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 (201864555941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100932277971 + 100932277972.

It is an arithmetic number, because the mean of its divisors is an integer number (100932277972).

Almost surely, 2^201864555943 is an apocalyptic number.

201864555943 is a deficient number, since it is larger than the sum of its proper divisors (1).

201864555943 is an equidigital number, since it uses as much as digits as its factorization.

201864555943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 201864555943 in words is "two hundred one billion, eight hundred sixty-four million, five hundred fifty-five thousand, nine hundred forty-three".