128886432616 has 16 divisors (see below), whose sum is σ = 241796270340. Its totient is φ = 64407427200.

The previous prime is 128886432601. The next prime is 128886432617. The reversal of 128886432616 is 616234688821.

It can be written as a sum of positive squares in 2 ways, for example, as 121280848516 + 7605584100 = 348254^2 + 87210^2 .

It is a super-2 number, since 2×128886432616² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128886432617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4458331 + ... + 4487146.

Almost surely, 2^128886432616 is an apocalyptic number.

It is an amenable number.

128886432616 is a deficient number, since it is larger than the sum of its proper divisors (112909837724).

128886432616 is a wasteful number, since it uses less digits than its factorization.

128886432616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8947284 (or 8947280 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 55.

The spelling of 128886432616 in words is "one hundred twenty-eight billion, eight hundred eighty-six million, four hundred thirty-two thousand, six hundred sixteen".