613721470026719 has 2 divisors, whose sum is σ = 613721470026720. Its totient is φ = 613721470026718.

The previous prime is 613721470026661. The next prime is 613721470026757. The reversal of 613721470026719 is 917620074127316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 613721470026719 - 2⁸ = 613721470026463 is a prime.

It is a super-2 number, since 2×613721470026719² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613721470026779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306860735013359 + 306860735013360.

It is an arithmetic number, because the mean of its divisors is an integer number (306860735013360).

Almost surely, 2^{613721470026719} is an apocalyptic number.

613721470026719 is a deficient number, since it is larger than the sum of its proper divisors (1).

613721470026719 is an equidigital number, since it uses as much as digits as its factorization.

613721470026719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 613721470026719 in words is "six hundred thirteen trillion, seven hundred twenty-one billion, four hundred seventy million, twenty-six thousand, seven hundred nineteen".