128651867135999 has 8 divisors (see below), whose sum is σ = 128694940631040. Its totient is φ = 128608797647736.

The previous prime is 128651867135971. The next prime is 128651867136029. The reversal of 128651867135999 is 999531768156821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128651867135999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128651867135959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63929534 + ... + 65911220.

It is an arithmetic number, because the mean of its divisors is an integer number (16086867578880).

Almost surely, 2^{128651867135999} is an apocalyptic number.

128651867135999 is a deficient number, since it is larger than the sum of its proper divisors (43073495041).

128651867135999 is a wasteful number, since it uses less digits than its factorization.

128651867135999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003389.

The product of its digits is 1763596800, while the sum is 80.

The spelling of 128651867135999 in words is "one hundred twenty-eight trillion, six hundred fifty-one billion, eight hundred sixty-seven million, one hundred thirty-five thousand, nine hundred ninety-nine".