129173967744 has 64 divisors (see below), whose sum is σ = 346973706000. Its totient is φ = 42574180352.

The previous prime is 129173967709. The next prime is 129173967761. The reversal of 129173967744 is 447769371921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

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, 1855659 + ... + 1924010.

Almost surely, 2^129173967744 is an apocalyptic number.

It is an amenable number.

129173967744 is an abundant number, since it is smaller than the sum of its proper divisors (217799738256).

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

129173967744 is an equidigital number, since it uses as much as digits as its factorization.

129173967744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779775 (or 3779763 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 60.

The spelling of 129173967744 in words is "one hundred twenty-nine billion, one hundred seventy-three million, nine hundred sixty-seven thousand, seven hundred forty-four".