6447397850 has 24 divisors (see below), whose sum is σ = 12009140220. Its totient is φ = 2575307520.

The previous prime is 6447397829. The next prime is 6447397907. The reversal of 6447397850 is 587937446.

It can be written as a sum of positive squares in 6 ways, for example, as 989291209 + 5458106641 = 31453^2 + 73879^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6447397792 and 6447397801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55487 + ... + 126386.

Almost surely, 2^6447397850 is an apocalyptic number.

6447397850 is a deficient number, since it is larger than the sum of its proper divisors (5561742370).

6447397850 is a wasteful number, since it uses less digits than its factorization.

6447397850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182594 (or 182589 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 53.

The square root of 6447397850 is about 80295.6901084984. The cubic root of 6447397850 is about 1861.2076261788.

The spelling of 6447397850 in words is "six billion, four hundred forty-seven million, three hundred ninety-seven thousand, eight hundred fifty".