13128321753866 has 32 divisors (see below), whose sum is σ = 21666660515136. Its totient is φ = 5916520368000.

The previous prime is 13128321753863. The next prime is 13128321753959. The reversal of 13128321753866 is 66835712382131.

13128321753866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13128321753863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3662195 + ... + 6298278.

It is an arithmetic number, because the mean of its divisors is an integer number (677083141098).

Almost surely, 2^{13128321753866} is an apocalyptic number.

13128321753866 is a deficient number, since it is larger than the sum of its proper divisors (8538338761270).

13128321753866 is a wasteful number, since it uses less digits than its factorization.

13128321753866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9960998.

The product of its digits is 8709120, while the sum is 56.

The spelling of 13128321753866 in words is "thirteen trillion, one hundred twenty-eight billion, three hundred twenty-one million, seven hundred fifty-three thousand, eight hundred sixty-six".