613543163221 has 2 divisors, whose sum is σ = 613543163222. Its totient is φ = 613543163220.

The previous prime is 613543163069. The next prime is 613543163267. The reversal of 613543163221 is 122361345316.

613543163221 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 can be written as a sum of positive squares in only one way, i.e., 316534512996 + 297008650225 = 562614^2 + 544985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613543163221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613543163021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306771581610 + 306771581611.

It is an arithmetic number, because the mean of its divisors is an integer number (306771581611).

Almost surely, 2^613543163221 is an apocalyptic number.

It is an amenable number.

613543163221 is a deficient number, since it is larger than the sum of its proper divisors (1).

613543163221 is an equidigital number, since it uses as much as digits as its factorization.

613543163221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 37.

The spelling of 613543163221 in words is "six hundred thirteen billion, five hundred forty-three million, one hundred sixty-three thousand, two hundred twenty-one".