6445445471 has 2 divisors, whose sum is σ = 6445445472. Its totient is φ = 6445445470.

The previous prime is 6445445441. The next prime is 6445445477. The reversal of 6445445471 is 1745445446.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6445445471 is a prime.

It is a super-3 number, since 3×6445445471³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6445445477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222722735 + 3222722736.

It is an arithmetic number, because the mean of its divisors is an integer number (3222722736).

Almost surely, 2^6445445471 is an apocalyptic number.

6445445471 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445445471 is an equidigital number, since it uses as much as digits as its factorization.

6445445471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1075200, while the sum is 44.

The square root of 6445445471 is about 80283.5317546507. The cubic root of 6445445471 is about 1861.0197390332.

The spelling of 6445445471 in words is "six billion, four hundred forty-five million, four hundred forty-five thousand, four hundred seventy-one".