646021263501347 has 2 divisors, whose sum is σ = 646021263501348. Its totient is φ = 646021263501346.

The previous prime is 646021263501307. The next prime is 646021263501473. The reversal of 646021263501347 is 743105362120646.

646021263501347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (646021263501473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646021263501347 - 2⁶ = 646021263501283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646021263501295 and 646021263501304.

It is not a weakly prime, because it can be changed into another prime (646021263501307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323010631750673 + 323010631750674.

It is an arithmetic number, because the mean of its divisors is an integer number (323010631750674).

Almost surely, 2^{646021263501347} is an apocalyptic number.

646021263501347 is a deficient number, since it is larger than the sum of its proper divisors (1).

646021263501347 is an equidigital number, since it uses as much as digits as its factorization.

646021263501347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 646021263501347 in words is "six hundred forty-six trillion, twenty-one billion, two hundred sixty-three million, five hundred one thousand, three hundred forty-seven".