129473763609 has 16 divisors (see below), whose sum is σ = 181993363200. Its totient is φ = 81648793296.

The previous prime is 129473763607. The next prime is 129473763613. The reversal of 129473763609 is 906367374921.

It is not a de Polignac number, because 129473763609 - 2¹ = 129473763607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129473763607) 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 15 ways as a sum of consecutive naturals, for example, 1685859 + ... + 1760984.

It is an arithmetic number, because the mean of its divisors is an integer number (11374585200).

Almost surely, 2^129473763609 is an apocalyptic number.

129473763609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

129473763609 is a deficient number, since it is larger than the sum of its proper divisors (52519599591).

129473763609 is a wasteful number, since it uses less digits than its factorization.

129473763609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447524.

The product of its (nonzero) digits is 10287648, while the sum is 57.

The spelling of 129473763609 in words is "one hundred twenty-nine billion, four hundred seventy-three million, seven hundred sixty-three thousand, six hundred nine".