128477135127 has 16 divisors (see below), whose sum is σ = 189665027712. Its totient is φ = 76702765920.

The previous prime is 128477135119. The next prime is 128477135147. The reversal of 128477135127 is 721531774821.

It is not a de Polignac number, because 128477135127 - 2³ = 128477135119 is a prime.

It is a super-2 number, since 2×128477135127² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128477135107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29051868 + ... + 29056289.

It is an arithmetic number, because the mean of its divisors is an integer number (11854064232).

Almost surely, 2^128477135127 is an apocalyptic number.

128477135127 is a deficient number, since it is larger than the sum of its proper divisors (61187892585).

128477135127 is a wasteful number, since it uses less digits than its factorization.

128477135127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58108238.

The product of its digits is 658560, while the sum is 48.

The spelling of 128477135127 in words is "one hundred twenty-eight billion, four hundred seventy-seven million, one hundred thirty-five thousand, one hundred twenty-seven".