613218851677 has 2 divisors, whose sum is σ = 613218851678. Its totient is φ = 613218851676.

The previous prime is 613218851621. The next prime is 613218851699. The reversal of 613218851677 is 776158812316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 524609041401 + 88609810276 = 724299^2 + 297674^2 .

It is a cyclic number.

It is not a de Polignac number, because 613218851677 - 2³⁹ = 63463037789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613218851177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306609425838 + 306609425839.

It is an arithmetic number, because the mean of its divisors is an integer number (306609425839).

Almost surely, 2^613218851677 is an apocalyptic number.

It is an amenable number.

613218851677 is a deficient number, since it is larger than the sum of its proper divisors (1).

613218851677 is an equidigital number, since it uses as much as digits as its factorization.

613218851677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 55.

The spelling of 613218851677 in words is "six hundred thirteen billion, two hundred eighteen million, eight hundred fifty-one thousand, six hundred seventy-seven".