128252999071 has 16 divisors (see below), whose sum is σ = 139628966400. Its totient is φ = 117344567808.

The previous prime is 128252999051. The next prime is 128252999081. The reversal of 128252999071 is 170999252821.

It is a cyclic number.

It is not a de Polignac number, because 128252999071 - 2⁷ = 128252998943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128252999051) 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, 554751 + ... + 751168.

It is an arithmetic number, because the mean of its divisors is an integer number (8726810400).

Almost surely, 2^128252999071 is an apocalyptic number.

128252999071 is a deficient number, since it is larger than the sum of its proper divisors (11375967329).

128252999071 is a wasteful number, since it uses less digits than its factorization.

128252999071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306098.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The spelling of 128252999071 in words is "one hundred twenty-eight billion, two hundred fifty-two million, nine hundred ninety-nine thousand, seventy-one".