128376422747 has 4 divisors (see below), whose sum is σ = 128592909720. Its totient is φ = 128159935776.

The previous prime is 128376422719. The next prime is 128376422749. The reversal of 128376422747 is 747224673821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747224673821 = 5639 ⋅132510139.

It is a cyclic number.

It is not a de Polignac number, because 128376422747 - 2⁶ = 128376422683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128376422749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108242597 + ... + 108243782.

It is an arithmetic number, because the mean of its divisors is an integer number (32148227430).

Almost surely, 2^128376422747 is an apocalyptic number.

128376422747 is a deficient number, since it is larger than the sum of its proper divisors (216486973).

128376422747 is an equidigital number, since it uses as much as digits as its factorization.

128376422747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216486972.

The product of its digits is 6322176, while the sum is 53.

The spelling of 128376422747 in words is "one hundred twenty-eight billion, three hundred seventy-six million, four hundred twenty-two thousand, seven hundred forty-seven".