128335127779 has 8 divisors (see below), whose sum is σ = 131881377888. Its totient is φ = 124792968960.

The previous prime is 128335127741. The next prime is 128335127783. The reversal of 128335127779 is 977721533821.

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 128335127779 - 2⁷ = 128335127651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128635127779) 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, 959167 + ... + 1084744.

It is an arithmetic number, because the mean of its divisors is an integer number (16485172236).

Almost surely, 2^128335127779 is an apocalyptic number.

128335127779 is a deficient number, since it is larger than the sum of its proper divisors (3546250109).

128335127779 is a wasteful number, since it uses less digits than its factorization.

128335127779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045645.

The product of its digits is 4445280, while the sum is 55.

The spelling of 128335127779 in words is "one hundred twenty-eight billion, three hundred thirty-five million, one hundred twenty-seven thousand, seven hundred seventy-nine".