128969829999 has 24 divisors (see below), whose sum is σ = 194414923872. Its totient is φ = 82230793920.

The previous prime is 128969829929. The next prime is 128969830061. The reversal of 128969829999 is 999928969821.

It is not a de Polignac number, because 128969829999 - 2⁷ = 128969829871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128969829929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1714609 + ... + 1788245.

It is an arithmetic number, because the mean of its divisors is an integer number (8100621828).

Almost surely, 2^128969829999 is an apocalyptic number.

128969829999 is a deficient number, since it is larger than the sum of its proper divisors (65445093873).

128969829999 is a wasteful number, since it uses less digits than its factorization.

128969829999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82127 (or 82124 counting only the distinct ones).

The product of its digits is 816293376, while the sum is 81.

The spelling of 128969829999 in words is "one hundred twenty-eight billion, nine hundred sixty-nine million, eight hundred twenty-nine thousand, nine hundred ninety-nine".