206641237541 has 2 divisors, whose sum is σ = 206641237542. Its totient is φ = 206641237540.

The previous prime is 206641237529. The next prime is 206641237553. The reversal of 206641237541 is 145732146602.

It is a balanced prime because it is at equal distance from previous prime (206641237529) and next prime (206641237553).

It can be written as a sum of positive squares in only one way, i.e., 124771432900 + 81869804641 = 353230^2 + 286129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206641237541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206641237591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103320618770 + 103320618771.

It is an arithmetic number, because the mean of its divisors is an integer number (103320618771).

Almost surely, 2^206641237541 is an apocalyptic number.

It is an amenable number.

206641237541 is a deficient number, since it is larger than the sum of its proper divisors (1).

206641237541 is an equidigital number, since it uses as much as digits as its factorization.

206641237541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 206641237541 in words is "two hundred six billion, six hundred forty-one million, two hundred thirty-seven thousand, five hundred forty-one".