12729921575 has 24 divisors (see below), whose sum is σ = 18044877792. Its totient is φ = 8726785920.

The previous prime is 12729921559. The next prime is 12729921583. The reversal of 12729921575 is 57512992721.

12729921575 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12729921575 - 2⁴ = 12729921559 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 902477 + ... + 916473.

It is an arithmetic number, because the mean of its divisors is an integer number (751869908).

Almost surely, 2^12729921575 is an apocalyptic number.

12729921575 is a deficient number, since it is larger than the sum of its proper divisors (5314956217).

12729921575 is a wasteful number, since it uses less digits than its factorization.

12729921575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19211 (or 19206 counting only the distinct ones).

The product of its digits is 793800, while the sum is 50.

The spelling of 12729921575 in words is "twelve billion, seven hundred twenty-nine million, nine hundred twenty-one thousand, five hundred seventy-five".