206728467507 has 12 divisors (see below), whose sum is σ = 298611736800. Its totient is φ = 137817155088.

The previous prime is 206728467499. The next prime is 206728467553. The reversal of 206728467507 is 705764827602.

206728467507 is a `hidden beast` number, since 2 + 0 + 6 + 72 + 8 + 4 + 67 + 507 = 666.

It is not a de Polignac number, because 206728467507 - 2³ = 206728467499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206728467557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1189453 + ... + 1352129.

It is an arithmetic number, because the mean of its divisors is an integer number (24884311400).

Almost surely, 2^206728467507 is an apocalyptic number.

206728467507 is a deficient number, since it is larger than the sum of its proper divisors (91883269293).

206728467507 is a wasteful number, since it uses less digits than its factorization.

206728467507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303882 (or 303879 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 54.

The spelling of 206728467507 in words is "two hundred six billion, seven hundred twenty-eight million, four hundred sixty-seven thousand, five hundred seven".