12556429693 has 6 divisors (see below), whose sum is σ = 12633962334. Its totient is φ = 12479369976.

The previous prime is 12556429679. The next prime is 12556429801. The reversal of 12556429693 is 39692465521.

It can be written as a sum of positive squares in only one way, i.e., 12321666009 + 234763684 = 111003^2 + 15322^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12556429693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12556429693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556429603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209730 + ... + 262867.

It is an arithmetic number, because the mean of its divisors is an integer number (2105660389).

Almost surely, 2^12556429693 is an apocalyptic number.

It is an amenable number.

12556429693 is a deficient number, since it is larger than the sum of its proper divisors (77532641).

12556429693 is an frugal number, since it uses more digits than its factorization.

12556429693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472923 (or 472760 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 52.

The spelling of 12556429693 in words is "twelve billion, five hundred fifty-six million, four hundred twenty-nine thousand, six hundred ninety-three".