195388420543 has 2 divisors, whose sum is σ = 195388420544. Its totient is φ = 195388420542.

The previous prime is 195388420541. The next prime is 195388420639. The reversal of 195388420543 is 345024883591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195388420543 - 2¹ = 195388420541 is a prime.

Together with 195388420541, 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 (195388420541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97694210271 + 97694210272.

It is an arithmetic number, because the mean of its divisors is an integer number (97694210272).

Almost surely, 2^195388420543 is an apocalyptic number.

195388420543 is a deficient number, since it is larger than the sum of its proper divisors (1).

195388420543 is an equidigital number, since it uses as much as digits as its factorization.

195388420543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 195388420543 in words is "one hundred ninety-five billion, three hundred eighty-eight million, four hundred twenty thousand, five hundred forty-three".