613611616391 has 2 divisors, whose sum is σ = 613611616392. Its totient is φ = 613611616390.

The previous prime is 613611616291. The next prime is 613611616411. The reversal of 613611616391 is 193616116316.

613611616391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613611616391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613611616291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306805808195 + 306805808196.

It is an arithmetic number, because the mean of its divisors is an integer number (306805808196).

Almost surely, 2^613611616391 is an apocalyptic number.

613611616391 is a deficient number, since it is larger than the sum of its proper divisors (1).

613611616391 is an equidigital number, since it uses as much as digits as its factorization.

613611616391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The spelling of 613611616391 in words is "six hundred thirteen billion, six hundred eleven million, six hundred sixteen thousand, three hundred ninety-one".