128259259161 has 16 divisors (see below), whose sum is σ = 186628896768. Its totient is φ = 77703728400.

The previous prime is 128259259127. The next prime is 128259259217. The reversal of 128259259161 is 161952952821.

It is not a de Polignac number, because 128259259161 - 2¹³ = 128259250969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128259259561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639421 + ... + 815706.

It is an arithmetic number, because the mean of its divisors is an integer number (11664306048).

Almost surely, 2^128259259161 is an apocalyptic number.

128259259161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128259259161 is a deficient number, since it is larger than the sum of its proper divisors (58369637607).

128259259161 is a wasteful number, since it uses less digits than its factorization.

128259259161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457812.

The product of its digits is 777600, while the sum is 51.

The spelling of 128259259161 in words is "one hundred twenty-eight billion, two hundred fifty-nine million, two hundred fifty-nine thousand, one hundred sixty-one".