206425160549 has 2 divisors, whose sum is σ = 206425160550. Its totient is φ = 206425160548.

The previous prime is 206425160521. The next prime is 206425160561. The reversal of 206425160549 is 945061524602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200301002500 + 6124158049 = 447550^2 + 78257^2 .

It is a cyclic number.

It is not a de Polignac number, because 206425160549 - 2²⁰ = 206424111973 is a prime.

It is a super-2 number, since 2×206425160549² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206425160509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103212580274 + 103212580275.

It is an arithmetic number, because the mean of its divisors is an integer number (103212580275).

Almost surely, 2^206425160549 is an apocalyptic number.

It is an amenable number.

206425160549 is a deficient number, since it is larger than the sum of its proper divisors (1).

206425160549 is an equidigital number, since it uses as much as digits as its factorization.

206425160549 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 44.

The spelling of 206425160549 in words is "two hundred six billion, four hundred twenty-five million, one hundred sixty thousand, five hundred forty-nine".