12721028659 has 8 divisors (see below), whose sum is σ = 12825861840. Its totient is φ = 12616312800.

The previous prime is 12721028647. The next prime is 12721028689. The reversal of 12721028659 is 95682012721.

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

It is a cyclic number.

It is not a de Polignac number, because 12721028659 - 2¹⁷ = 12720897587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12721028629) 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, 195469 + ... + 252289.

It is an arithmetic number, because the mean of its divisors is an integer number (1603232730).

Almost surely, 2^12721028659 is an apocalyptic number.

12721028659 is a deficient number, since it is larger than the sum of its proper divisors (104833181).

12721028659 is a wasteful number, since it uses less digits than its factorization.

12721028659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58661.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 12721028659 in words is "twelve billion, seven hundred twenty-one million, twenty-eight thousand, six hundred fifty-nine".