621418041294313 has 2 divisors, whose sum is σ = 621418041294314. Its totient is φ = 621418041294312.

The previous prime is 621418041294257. The next prime is 621418041294331. The reversal of 621418041294313 is 313492140814126.

Together with next prime (621418041294331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618322581084649 + 3095460209664 = 24866093^2 + 1759392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621418041294313 is a prime.

It is a super-2 number, since 2×621418041294313² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (621418041994313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310709020647156 + 310709020647157.

It is an arithmetic number, because the mean of its divisors is an integer number (310709020647157).

Almost surely, 2^{621418041294313} is an apocalyptic number.

It is an amenable number.

621418041294313 is a deficient number, since it is larger than the sum of its proper divisors (1).

621418041294313 is an equidigital number, since it uses as much as digits as its factorization.

621418041294313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 621418041294313 in words is "six hundred twenty-one trillion, four hundred eighteen billion, forty-one million, two hundred ninety-four thousand, three hundred thirteen".