13812720729 has 8 divisors (see below), whose sum is σ = 18422625120. Its totient is φ = 9205648416.

The previous prime is 13812720703. The next prime is 13812720739. The reversal of 13812720729 is 92702721831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13812720729 - 2⁹ = 13812720217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13812720739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696612 + ... + 716165.

It is an arithmetic number, because the mean of its divisors is an integer number (2302828140).

Almost surely, 2^13812720729 is an apocalyptic number.

It is an amenable number.

13812720729 is a deficient number, since it is larger than the sum of its proper divisors (4609904391).

13812720729 is a wasteful number, since it uses less digits than its factorization.

13812720729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416039.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 13812720729 in words is "thirteen billion, eight hundred twelve million, seven hundred twenty thousand, seven hundred twenty-nine".