128664376832 has 20 divisors (see below), whose sum is σ = 257077457076. Its totient is φ = 64332188160.

The previous prime is 128664376823. The next prime is 128664376949. The reversal of 128664376832 is 238673466821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125648294 + ... + 125649317.

Almost surely, 2^128664376832 is an apocalyptic number.

It is an amenable number.

128664376832 is a deficient number, since it is larger than the sum of its proper divisors (128413080244).

128664376832 is an frugal number, since it uses more digits than its factorization.

128664376832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251297629 (or 251297613 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 56.

The spelling of 128664376832 in words is "one hundred twenty-eight billion, six hundred sixty-four million, three hundred seventy-six thousand, eight hundred thirty-two".