128547271791 has 48 divisors (see below), whose sum is σ = 209920778496. Its totient is φ = 75355999488.

The previous prime is 128547271781. The next prime is 128547271817. The reversal of 128547271791 is 197172745821.

128547271791 is a `hidden beast` number, since 1 + 2 + 8 + 547 + 2 + 7 + 1 + 7 + 91 = 666.

It is not a de Polignac number, because 128547271791 - 2¹⁷ = 128547140719 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128547271711) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 273445 + ... + 576078.

It is an arithmetic number, because the mean of its divisors is an integer number (4373349552).

Almost surely, 2^128547271791 is an apocalyptic number.

128547271791 is a deficient number, since it is larger than the sum of its proper divisors (81373506705).

128547271791 is a wasteful number, since it uses less digits than its factorization.

128547271791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849612 (or 849609 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 54.

The spelling of 128547271791 in words is "one hundred twenty-eight billion, five hundred forty-seven million, two hundred seventy-one thousand, seven hundred ninety-one".