6445316651 has 2 divisors, whose sum is σ = 6445316652. Its totient is φ = 6445316650.

The previous prime is 6445316617. The next prime is 6445316653. The reversal of 6445316651 is 1566135446.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6445316651 is a prime.

Together with 6445316653, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6445316599 and 6445316608.

It is not a weakly prime, because it can be changed into another prime (6445316653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222658325 + 3222658326.

It is an arithmetic number, because the mean of its divisors is an integer number (3222658326).

Almost surely, 2^6445316651 is an apocalyptic number.

6445316651 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445316651 is an equidigital number, since it uses as much as digits as its factorization.

6445316651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 41.

The square root of 6445316651 is about 80282.7294690458. The cubic root of 6445316651 is about 1861.0073407094.

The spelling of 6445316651 in words is "six billion, four hundred forty-five million, three hundred sixteen thousand, six hundred fifty-one".