613812713321 has 8 divisors (see below), whose sum is σ = 616056347784. Its totient is φ = 611569278720.

The previous prime is 613812713287. The next prime is 613812713347. The reversal of 613812713321 is 123317218316.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 371354953321 + 242457760000 = 609389^2 + 492400^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613812713321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613812719321) 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, 9244481 + ... + 9310641.

It is an arithmetic number, because the mean of its divisors is an integer number (77007043473).

Almost surely, 2^613812713321 is an apocalyptic number.

It is an amenable number.

613812713321 is a deficient number, since it is larger than the sum of its proper divisors (2243634463).

613812713321 is a wasteful number, since it uses less digits than its factorization.

613812713321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99931.

The product of its digits is 36288, while the sum is 38.

The spelling of 613812713321 in words is "six hundred thirteen billion, eight hundred twelve million, seven hundred thirteen thousand, three hundred twenty-one".