128085252099 has 64 divisors (see below), whose sum is σ = 211644195840. Its totient is φ = 67340206080.

The previous prime is 128085252077. The next prime is 128085252131. The reversal of 128085252099 is 990252580821.

It is a Cunningham number, because it is equal to 357890²-1.

It is not a de Polignac number, because 128085252099 - 2¹⁹ = 128084727811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128085252049) 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 63 ways as a sum of consecutive naturals, for example, 1014019 + ... + 1133315.

It is an arithmetic number, because the mean of its divisors is an integer number (3306940560).

Almost surely, 2^128085252099 is an apocalyptic number.

128085252099 is a deficient number, since it is larger than the sum of its proper divisors (83558943741).

128085252099 is a wasteful number, since it uses less digits than its factorization.

128085252099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119420.

The product of its (nonzero) digits is 1036800, while the sum is 51.

The spelling of 128085252099 in words is "one hundred twenty-eight billion, eighty-five million, two hundred fifty-two thousand, ninety-nine".