128975641571 has 4 divisors (see below), whose sum is σ = 147400733232. Its totient is φ = 110550549912.

The previous prime is 128975641541. The next prime is 128975641601. The reversal of 128975641571 is 175146579821.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (128975641541) and next prime (128975641601).

It is a cyclic number.

It is not a de Polignac number, because 128975641571 - 2¹⁸ = 128975379427 is a prime.

It is a super-2 number, since 2×128975641571² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128975641541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9212545820 + ... + 9212545833.

It is an arithmetic number, because the mean of its divisors is an integer number (36850183308).

Almost surely, 2^128975641571 is an apocalyptic number.

128975641571 is a deficient number, since it is larger than the sum of its proper divisors (18425091661).

128975641571 is an equidigital number, since it uses as much as digits as its factorization.

128975641571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425091660.

The product of its digits is 4233600, while the sum is 56.

The spelling of 128975641571 in words is "one hundred twenty-eight billion, nine hundred seventy-five million, six hundred forty-one thousand, five hundred seventy-one".