206728467508 has 12 divisors (see below), whose sum is σ = 363649300420. Its totient is φ = 102828667392.

The previous prime is 206728467499. The next prime is 206728467553. The reversal of 206728467508 is 805764827602.

It can be written as a sum of positive squares in 2 ways, for example, as 95618245284 + 111110222224 = 309222^2 + 333332^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133890723 + ... + 133892266.

Almost surely, 2^206728467508 is an apocalyptic number.

It is an amenable number.

206728467508 is a deficient number, since it is larger than the sum of its proper divisors (156920832912).

206728467508 is a wasteful number, since it uses less digits than its factorization.

206728467508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267783186 (or 267783184 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 55.

The spelling of 206728467508 in words is "two hundred six billion, seven hundred twenty-eight million, four hundred sixty-seven thousand, five hundred eight".