12729356901 has 16 divisors (see below), whose sum is σ = 19367992000. Its totient is φ = 8256879504.

The previous prime is 12729356897. The next prime is 12729356953. The reversal of 12729356901 is 10965392721.

It is a happy number.

12729356901 is a `hidden beast` number, since 12 + 72 + 9 + 3 + 569 + 0 + 1 = 666.

It is not a de Polignac number, because 12729356901 - 2² = 12729356897 is a prime.

It is a super-2 number, since 2×12729356901² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12729356401) 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, 6370051 + ... + 6372048.

It is an arithmetic number, because the mean of its divisors is an integer number (1210499500).

Almost surely, 2^12729356901 is an apocalyptic number.

It is an amenable number.

12729356901 is a deficient number, since it is larger than the sum of its proper divisors (6638635099).

12729356901 is a wasteful number, since it uses less digits than its factorization.

12729356901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12742145 (or 12742139 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 12729356901 in words is "twelve billion, seven hundred twenty-nine million, three hundred fifty-six thousand, nine hundred one".