613120521316321 has 2 divisors, whose sum is σ = 613120521316322. Its totient is φ = 613120521316320.

The previous prime is 613120521316301. The next prime is 613120521316349. The reversal of 613120521316321 is 123613125021316.

613120521316321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 594268113088225 + 18852408228096 = 24377615^2 + 4341936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613120521316321 is a prime.

It is not a weakly prime, because it can be changed into another prime (613120521316301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306560260658160 + 306560260658161.

It is an arithmetic number, because the mean of its divisors is an integer number (306560260658161).

Almost surely, 2^{613120521316321} is an apocalyptic number.

It is an amenable number.

613120521316321 is a deficient number, since it is larger than the sum of its proper divisors (1).

613120521316321 is an equidigital number, since it uses as much as digits as its factorization.

613120521316321 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 37.

Adding to 613120521316321 its reverse (123613125021316), we get a palindrome (736733646337637).

The spelling of 613120521316321 in words is "six hundred thirteen trillion, one hundred twenty billion, five hundred twenty-one million, three hundred sixteen thousand, three hundred twenty-one".