12721453713 has 6 divisors (see below), whose sum is σ = 18375433154. Its totient is φ = 8480969136.

The previous prime is 12721453711. The next prime is 12721453733. The reversal of 12721453713 is 31735412721.

12721453713 is a `hidden beast` number, since 1 + 272 + 14 + 5 + 371 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6986117889 + 5735335824 = 83583^2 + 75732^2 .

It is not a de Polignac number, because 12721453713 - 2¹ = 12721453711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12721453711) 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, 706747420 + ... + 706747437.

Almost surely, 2^12721453713 is an apocalyptic number.

It is an amenable number.

12721453713 is a deficient number, since it is larger than the sum of its proper divisors (5653979441).

12721453713 is a wasteful number, since it uses less digits than its factorization.

12721453713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413494863 (or 1413494860 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The spelling of 12721453713 in words is "twelve billion, seven hundred twenty-one million, four hundred fifty-three thousand, seven hundred thirteen".