6443957625 has 32 divisors (see below), whose sum is σ = 12254571264. Its totient is φ = 2945808000.

The previous prime is 6443957591. The next prime is 6443957687. The reversal of 6443957625 is 5267593446.

It is not a de Polignac number, because 6443957625 - 2¹⁵ = 6443924857 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 1224796 + ... + 1230045.

It is an arithmetic number, because the mean of its divisors is an integer number (382955352).

Almost surely, 2^6443957625 is an apocalyptic number.

It is an amenable number.

6443957625 is a deficient number, since it is larger than the sum of its proper divisors (5810613639).

6443957625 is a wasteful number, since it uses less digits than its factorization.

6443957625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454866 (or 2454856 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 51.

The square root of 6443957625 is about 80274.2650231069. The cubic root of 6443957625 is about 1860.8765307336.

The spelling of 6443957625 in words is "six billion, four hundred forty-three million, nine hundred fifty-seven thousand, six hundred twenty-five".