128999244629 has 8 divisors (see below), whose sum is σ = 129794176512. Its totient is φ = 128205216720.

The previous prime is 128999244617. The next prime is 128999244659. The reversal of 128999244629 is 926442999821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128999244629 - 2³⁶ = 60279767893 is a prime.

It is a super-2 number, since 2×128999244629² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128999244659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61412 + ... + 511634.

It is an arithmetic number, because the mean of its divisors is an integer number (16224272064).

Almost surely, 2^128999244629 is an apocalyptic number.

It is an amenable number.

128999244629 is a deficient number, since it is larger than the sum of its proper divisors (794931883).

128999244629 is a wasteful number, since it uses less digits than its factorization.

128999244629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451987.

The product of its digits is 40310784, while the sum is 65.

The spelling of 128999244629 in words is "one hundred twenty-eight billion, nine hundred ninety-nine million, two hundred forty-four thousand, six hundred twenty-nine".