6447808545 has 32 divisors (see below), whose sum is σ = 10519621632. Its totient is φ = 3371227392.

The previous prime is 6447808529. The next prime is 6447808553. The reversal of 6447808545 is 5458087446.

It is not a de Polignac number, because 6447808545 - 2⁴ = 6447808529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1319647 + ... + 1324523.

It is an arithmetic number, because the mean of its divisors is an integer number (328738176).

Almost surely, 2^6447808545 is an apocalyptic number.

It is an amenable number.

6447808545 is a deficient number, since it is larger than the sum of its proper divisors (4071813087).

6447808545 is a wasteful number, since it uses less digits than its factorization.

6447808545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601.

The product of its (nonzero) digits is 4300800, while the sum is 51.

The square root of 6447808545 is about 80298.2474590822. The cubic root of 6447808545 is about 1861.2471445734.

The spelling of 6447808545 in words is "six billion, four hundred forty-seven million, eight hundred eight thousand, five hundred forty-five".