201868535191 has 2 divisors, whose sum is σ = 201868535192. Its totient is φ = 201868535190.

The previous prime is 201868535153. The next prime is 201868535207. The reversal of 201868535191 is 191535868102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201868535191 - 2³⁷ = 64429581719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201868535131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100934267595 + 100934267596.

It is an arithmetic number, because the mean of its divisors is an integer number (100934267596).

Almost surely, 2^201868535191 is an apocalyptic number.

201868535191 is a deficient number, since it is larger than the sum of its proper divisors (1).

201868535191 is an equidigital number, since it uses as much as digits as its factorization.

201868535191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 49.

The spelling of 201868535191 in words is "two hundred one billion, eight hundred sixty-eight million, five hundred thirty-five thousand, one hundred ninety-one".