206728467499 has 2 divisors, whose sum is σ = 206728467500. Its totient is φ = 206728467498.

The previous prime is 206728467487. The next prime is 206728467553. The reversal of 206728467499 is 994764827602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206728467499 - 2¹⁹ = 206727943211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206728467499.

It is not a weakly prime, because it can be changed into another prime (206728467199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103364233749 + 103364233750.

It is an arithmetic number, because the mean of its divisors is an integer number (103364233750).

Almost surely, 2^206728467499 is an apocalyptic number.

206728467499 is a deficient number, since it is larger than the sum of its proper divisors (1).

206728467499 is an equidigital number, since it uses as much as digits as its factorization.

206728467499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73156608, while the sum is 64.

The spelling of 206728467499 in words is "two hundred six billion, seven hundred twenty-eight million, four hundred sixty-seven thousand, four hundred ninety-nine".