6450939616871 has 2 divisors, whose sum is σ = 6450939616872. Its totient is φ = 6450939616870.

The previous prime is 6450939616867. The next prime is 6450939616903. The reversal of 6450939616871 is 1786169390546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6450939616871 - 2² = 6450939616867 is a prime.

It is a super-2 number, since 2×6450939616871² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 6450939616798 and 6450939616807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6450939616861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225469808435 + 3225469808436.

It is an arithmetic number, because the mean of its divisors is an integer number (3225469808436).

Almost surely, 2^{6450939616871} is an apocalyptic number.

6450939616871 is a deficient number, since it is larger than the sum of its proper divisors (1).

6450939616871 is an equidigital number, since it uses as much as digits as its factorization.

6450939616871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58786560, while the sum is 65.

The spelling of 6450939616871 in words is "six trillion, four hundred fifty billion, nine hundred thirty-nine million, six hundred sixteen thousand, eight hundred seventy-one".