12651546613 has 4 divisors (see below), whose sum is σ = 12651823980. Its totient is φ = 12651269248.

The previous prime is 12651546581. The next prime is 12651546629. The reversal of 12651546613 is 31664515621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31664515621 = 29 ⋅1091879849.

It can be written as a sum of positive squares in 2 ways, for example, as 515880369 + 12135666244 = 22713^2 + 110162^2 .

It is a cyclic number.

It is not a de Polignac number, because 12651546613 - 2⁵ = 12651546581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651546113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52348 + ... + 167461.

It is an arithmetic number, because the mean of its divisors is an integer number (3162955995).

Almost surely, 2^12651546613 is an apocalyptic number.

It is an amenable number.

12651546613 is a deficient number, since it is larger than the sum of its proper divisors (277367).

12651546613 is an equidigital number, since it uses as much as digits as its factorization.

12651546613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277366.

The product of its digits is 129600, while the sum is 40.

The spelling of 12651546613 in words is "twelve billion, six hundred fifty-one million, five hundred forty-six thousand, six hundred thirteen".