6445113473 has 2 divisors, whose sum is σ = 6445113474. Its totient is φ = 6445113472.

The previous prime is 6445113469. The next prime is 6445113517. The reversal of 6445113473 is 3743115446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6332498929 + 112614544 = 79577^2 + 10612^2 .

It is a cyclic number.

It is not a de Polignac number, because 6445113473 - 2² = 6445113469 is a prime.

It is a super-2 number, since 2×6445113473² = 83078975359692243458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6445113673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222556736 + 3222556737.

It is an arithmetic number, because the mean of its divisors is an integer number (3222556737).

Almost surely, 2^6445113473 is an apocalyptic number.

It is an amenable number.

6445113473 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445113473 is an equidigital number, since it uses as much as digits as its factorization.

6445113473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 38.

The square root of 6445113473 is about 80281.4640686130. The cubic root of 6445113473 is about 1860.9877854394.

The spelling of 6445113473 in words is "six billion, four hundred forty-five million, one hundred thirteen thousand, four hundred seventy-three".