136643305868 has 6 divisors (see below), whose sum is σ = 239125785276. Its totient is φ = 68321652932.

The previous prime is 136643305861. The next prime is 136643305871. The reversal of 136643305868 is 868503346631.

It is not an unprimeable number, because it can be changed into a prime (136643305861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17080413230 + ... + 17080413237.

It is an arithmetic number, because the mean of its divisors is an integer number (39854297546).

Almost surely, 2^136643305868 is an apocalyptic number.

It is an amenable number.

136643305868 is a deficient number, since it is larger than the sum of its proper divisors (102482479408).

136643305868 is a wasteful number, since it uses less digits than its factorization.

136643305868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34160826471 (or 34160826469 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 136643305868 in words is "one hundred thirty-six billion, six hundred forty-three million, three hundred five thousand, eight hundred sixty-eight".