6445645143 has 32 divisors (see below), whose sum is σ = 10266009600. Its totient is φ = 3517230816.

The previous prime is 6445645133. The next prime is 6445645163. The reversal of 6445645143 is 3415465446.

It is not a de Polignac number, because 6445645143 - 2⁹ = 6445644631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6445645095 and 6445645104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445645123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288198 + ... + 309756.

It is an arithmetic number, because the mean of its divisors is an integer number (320812800).

Almost surely, 2^6445645143 is an apocalyptic number.

6445645143 is a deficient number, since it is larger than the sum of its proper divisors (3820364457).

6445645143 is a wasteful number, since it uses less digits than its factorization.

6445645143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22211.

The product of its digits is 691200, while the sum is 42.

The square root of 6445645143 is about 80284.7752877219. The cubic root of 6445645143 is about 1861.0389562049.

The spelling of 6445645143 in words is "six billion, four hundred forty-five million, six hundred forty-five thousand, one hundred forty-three".