129446166892 has 18 divisors (see below), whose sum is σ = 263515411572. Its totient is φ = 55476928584.

The previous prime is 129446166877. The next prime is 129446166943. The reversal of 129446166892 is 298661644921.

It is a happy number.

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 5 ways as a sum of consecutive naturals, for example, 330219618 + ... + 330220009.

Almost surely, 2^129446166892 is an apocalyptic number.

It is an amenable number.

129446166892 is an abundant number, since it is smaller than the sum of its proper divisors (134069244680).

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

129446166892 is a wasteful number, since it uses less digits than its factorization.

129446166892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660439645 (or 660439636 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 58.

The spelling of 129446166892 in words is "one hundred twenty-nine billion, four hundred forty-six million, one hundred sixty-six thousand, eight hundred ninety-two".