128178939179 has 4 divisors (see below), whose sum is σ = 128233462560. Its totient is φ = 128124415800.

The previous prime is 128178939169. The next prime is 128178939181. The reversal of 128178939179 is 971939871821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 971939871821 = 31 ⋅31352899091.

It is a cyclic number.

It is not a de Polignac number, because 128178939179 - 2¹⁶ = 128178873643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128178939139) 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, 27258164 + ... + 27262865.

It is an arithmetic number, because the mean of its divisors is an integer number (32058365640).

Almost surely, 2^128178939179 is an apocalyptic number.

128178939179 is a deficient number, since it is larger than the sum of its proper divisors (54523381).

128178939179 is an equidigital number, since it uses as much as digits as its factorization.

128178939179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54523380.

The product of its digits is 13716864, while the sum is 65.

The spelling of 128178939179 in words is "one hundred twenty-eight billion, one hundred seventy-eight million, nine hundred thirty-nine thousand, one hundred seventy-nine".