613660645313 has 2 divisors, whose sum is σ = 613660645314. Its totient is φ = 613660645312.

The previous prime is 613660645277. The next prime is 613660645327. The reversal of 613660645313 is 313546066316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432446966449 + 181213678864 = 657607^2 + 425692^2 .

It is a cyclic number.

It is not a de Polignac number, because 613660645313 - 2⁶ = 613660645249 is a prime.

It is not a weakly prime, because it can be changed into another prime (613660645373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306830322656 + 306830322657.

It is an arithmetic number, because the mean of its divisors is an integer number (306830322657).

Almost surely, 2^613660645313 is an apocalyptic number.

It is an amenable number.

613660645313 is a deficient number, since it is larger than the sum of its proper divisors (1).

613660645313 is an equidigital number, since it uses as much as digits as its factorization.

613660645313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 44.

The spelling of 613660645313 in words is "six hundred thirteen billion, six hundred sixty million, six hundred forty-five thousand, three hundred thirteen".