128136771546 has 24 divisors (see below), whose sum is σ = 298114122240. Its totient is φ = 36610506072.

The previous prime is 128136771523. The next prime is 128136771557. The reversal of 128136771546 is 645177631821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217919386 + ... + 217919973.

It is an arithmetic number, because the mean of its divisors is an integer number (12421421760).

Almost surely, 2^128136771546 is an apocalyptic number.

128136771546 is an abundant number, since it is smaller than the sum of its proper divisors (169977350694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128136771546 is a wasteful number, since it uses less digits than its factorization.

128136771546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435839378 (or 435839371 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 51.

The spelling of 128136771546 in words is "one hundred twenty-eight billion, one hundred thirty-six million, seven hundred seventy-one thousand, five hundred forty-six".