128365334636 has 48 divisors (see below), whose sum is σ = 294810351360. Its totient is φ = 47380230720.

The previous prime is 128365334501. The next prime is 128365334641. The reversal of 128365334636 is 636433563821.

It is a super-2 number, since 2×128365334636² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10961795 + ... + 10973498.

It is an arithmetic number, because the mean of its divisors is an integer number (6141882320).

Almost surely, 2^128365334636 is an apocalyptic number.

It is an amenable number.

128365334636 is an abundant number, since it is smaller than the sum of its proper divisors (166445016724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128365334636 is a wasteful number, since it uses less digits than its factorization.

128365334636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21935334 (or 21935332 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 50.

The spelling of 128365334636 in words is "one hundred twenty-eight billion, three hundred sixty-five million, three hundred thirty-four thousand, six hundred thirty-six".