206124512549 has 2 divisors, whose sum is σ = 206124512550. Its totient is φ = 206124512548.

The previous prime is 206124512537. The next prime is 206124512597. The reversal of 206124512549 is 945215421602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205882710049 + 241802500 = 453743^2 + 15550^2 .

It is a cyclic number.

It is not a de Polignac number, because 206124512549 - 2⁴ = 206124512533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206124512449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103062256274 + 103062256275.

It is an arithmetic number, because the mean of its divisors is an integer number (103062256275).

Almost surely, 2^206124512549 is an apocalyptic number.

It is an amenable number.

206124512549 is a deficient number, since it is larger than the sum of its proper divisors (1).

206124512549 is an equidigital number, since it uses as much as digits as its factorization.

206124512549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 206124512549 in words is "two hundred six billion, one hundred twenty-four million, five hundred twelve thousand, five hundred forty-nine".