128007432844 has 6 divisors (see below), whose sum is σ = 224013007484. Its totient is φ = 64003716420.

The previous prime is 128007432827. The next prime is 128007432853. The reversal of 128007432844 is 448234700821.

It is a super-2 number, since 2×128007432844² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128007432844.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16000929102 + ... + 16000929109.

Almost surely, 2^128007432844 is an apocalyptic number.

It is an amenable number.

128007432844 is a deficient number, since it is larger than the sum of its proper divisors (96005574640).

128007432844 is a wasteful number, since it uses less digits than its factorization.

128007432844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32001858215 (or 32001858213 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 43.

The spelling of 128007432844 in words is "one hundred twenty-eight billion, seven million, four hundred thirty-two thousand, eight hundred forty-four".