613543163021 has 2 divisors, whose sum is σ = 613543163022. Its totient is φ = 613543163020.

The previous prime is 613543163017. The next prime is 613543163053. The reversal of 613543163021 is 120361345316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585241830121 + 28301332900 = 765011^2 + 168230^2 .

It is a cyclic number.

It is not a de Polignac number, because 613543163021 - 2² = 613543163017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613543163011) 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, 306771581510 + 306771581511.

It is an arithmetic number, because the mean of its divisors is an integer number (306771581511).

Almost surely, 2^613543163021 is an apocalyptic number.

It is an amenable number.

613543163021 is a deficient number, since it is larger than the sum of its proper divisors (1).

613543163021 is an equidigital number, since it uses as much as digits as its factorization.

613543163021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 613543163021 in words is "six hundred thirteen billion, five hundred forty-three million, one hundred sixty-three thousand, twenty-one".