129688888892 has 24 divisors (see below), whose sum is σ = 228026482992. Its totient is φ = 64539129600.

The previous prime is 129688888883. The next prime is 129688888897. The reversal of 129688888892 is 298888886921.

It is a super-4 number, since 4×129688888892⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129688888897) 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 7 ways as a sum of consecutive naturals, for example, 702542 + ... + 867722.

It is an arithmetic number, because the mean of its divisors is an integer number (9501103458).

Almost surely, 2^129688888892 is an apocalyptic number.

It is an amenable number.

129688888892 is a deficient number, since it is larger than the sum of its proper divisors (98337594100).

129688888892 is a wasteful number, since it uses less digits than its factorization.

129688888892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166109 (or 166107 counting only the distinct ones).

The product of its digits is 509607936, while the sum is 77.

The spelling of 129688888892 in words is "one hundred twenty-nine billion, six hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred ninety-two".