613243564639 has 2 divisors, whose sum is σ = 613243564640. Its totient is φ = 613243564638.

The previous prime is 613243564613. The next prime is 613243564649. The reversal of 613243564639 is 936465342316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 613243564639 - 2²³ = 613235176031 is a prime.

It is a super-2 number, since 2×613243564639² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613243564649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306621782319 + 306621782320.

It is an arithmetic number, because the mean of its divisors is an integer number (306621782320).

Almost surely, 2^613243564639 is an apocalyptic number.

613243564639 is a deficient number, since it is larger than the sum of its proper divisors (1).

613243564639 is an equidigital number, since it uses as much as digits as its factorization.

613243564639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8398080, while the sum is 52.

The spelling of 613243564639 in words is "six hundred thirteen billion, two hundred forty-three million, five hundred sixty-four thousand, six hundred thirty-nine".