12640167613 has 8 divisors (see below), whose sum is σ = 12815401400. Its totient is φ = 12464990208.

The previous prime is 12640167593. The next prime is 12640167619. The reversal of 12640167613 is 31676104621.

It can be written as a sum of positive squares in 4 ways, for example, as 1857006649 + 10783160964 = 43093^2 + 103842^2 .

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 12640167613 - 2⁹ = 12640167101 is a prime.

It is the 112429-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640167619) by changing a digit.

It is a nontrivial repunit in base 112428.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655453 + ... + 674461.

It is an arithmetic number, because the mean of its divisors is an integer number (1601925175).

Almost surely, 2^12640167613 is an apocalyptic number.

It is an amenable number.

12640167613 is a deficient number, since it is larger than the sum of its proper divisors (175233787).

12640167613 is an equidigital number, since it uses as much as digits as its factorization.

12640167613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28191.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 12640167613 in words is "twelve billion, six hundred forty million, one hundred sixty-seven thousand, six hundred thirteen".