201894664258141 has 2 divisors, whose sum is σ = 201894664258142. Its totient is φ = 201894664258140.

The previous prime is 201894664258121. The next prime is 201894664258187. The reversal of 201894664258141 is 141852466498102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175202417324025 + 26692246934116 = 13236405^2 + 5166454^2 .

It is a cyclic number.

It is not a de Polignac number, because 201894664258141 - 2⁷ = 201894664258013 is a prime.

It is a super-2 number, since 2×201894664258141² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201894664258141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201894664258121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100947332129070 + 100947332129071.

It is an arithmetic number, because the mean of its divisors is an integer number (100947332129071).

Almost surely, 2^{201894664258141} is an apocalyptic number.

It is an amenable number.

201894664258141 is a deficient number, since it is larger than the sum of its proper divisors (1).

201894664258141 is an equidigital number, since it uses as much as digits as its factorization.

201894664258141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26542080, while the sum is 61.

The spelling of 201894664258141 in words is "two hundred one trillion, eight hundred ninety-four billion, six hundred sixty-four million, two hundred fifty-eight thousand, one hundred forty-one".