129669831786 has 16 divisors (see below), whose sum is σ = 282915996768. Its totient is φ = 39293888400.

The previous prime is 129669831773. The next prime is 129669831847. The reversal of 129669831786 is 687138966921.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 1964694421 = 129669831786 / (1 + 2 + 9 + 6 + 6 + 9 + 8 + 3 + 1 + 7 + 8 + 6).

It is an unprimeable number.

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, 982347145 + ... + 982347276.

It is an arithmetic number, because the mean of its divisors is an integer number (17682249798).

Almost surely, 2^129669831786 is an apocalyptic number.

129669831786 is an abundant number, since it is smaller than the sum of its proper divisors (153246164982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129669831786 is a wasteful number, since it uses less digits than its factorization.

129669831786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964694437.

The product of its digits is 47029248, while the sum is 66.

The spelling of 129669831786 in words is "one hundred twenty-nine billion, six hundred sixty-nine million, eight hundred thirty-one thousand, seven hundred eighty-six".