1205310728668 has 12 divisors (see below), whose sum is σ = 2220309237160. Its totient is φ = 570936660912.

The previous prime is 1205310728663. The next prime is 1205310728669. The reversal of 1205310728668 is 8668270135021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205310728663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7929675771 + ... + 7929675922.

Almost surely, 2^{1205310728668} is an apocalyptic number.

It is an amenable number.

1205310728668 is a deficient number, since it is larger than the sum of its proper divisors (1014998508492).

1205310728668 is a wasteful number, since it uses less digits than its factorization.

1205310728668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15859351716 (or 15859351714 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 1205310728668 in words is "one trillion, two hundred five billion, three hundred ten million, seven hundred twenty-eight thousand, six hundred sixty-eight".