128026973687 has 8 divisors (see below), whose sum is σ = 139112501760. Its totient is φ = 117376172280.

The previous prime is 128026973677. The next prime is 128026973693. The reversal of 128026973687 is 786379620821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 128026973687 - 2⁶ = 128026973623 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 (128026973677) 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, 108681053 + ... + 108682230.

It is an arithmetic number, because the mean of its divisors is an integer number (17389062720).

Almost surely, 2^128026973687 is an apocalyptic number.

128026973687 is a deficient number, since it is larger than the sum of its proper divisors (11085528073).

128026973687 is a wasteful number, since it uses less digits than its factorization.

128026973687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217363333.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 128026973687 in words is "one hundred twenty-eight billion, twenty-six million, nine hundred seventy-three thousand, six hundred eighty-seven".