129623143646 has 16 divisors (see below), whose sum is σ = 203894701200. Its totient is φ = 61719473088.

The previous prime is 129623143613. The next prime is 129623143687. The reversal of 129623143646 is 646341326921.

It is a self number, because there is not a number n which added to its sum of digits gives 129623143646.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 15303176 + ... + 15311643.

It is an arithmetic number, because the mean of its divisors is an integer number (12743418825).

Almost surely, 2^129623143646 is an apocalyptic number.

129623143646 is a deficient number, since it is larger than the sum of its proper divisors (74271557554).

129623143646 is a wasteful number, since it uses less digits than its factorization.

129623143646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30614923.

The product of its digits is 1119744, while the sum is 47.

The spelling of 129623143646 in words is "one hundred twenty-nine billion, six hundred twenty-three million, one hundred forty-three thousand, six hundred forty-six".