6444453947 has 16 divisors (see below), whose sum is σ = 6825772800. Its totient is φ = 6077040480.

The previous prime is 6444453937. The next prime is 6444453949. The reversal of 6444453947 is 7493544446.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6444453947 - 2⁴ = 6444453931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6444453895 and 6444453904.

It is not an unprimeable number, because it can be changed into a prime (6444453949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134204 + ... + 175782.

It is an arithmetic number, because the mean of its divisors is an integer number (426610800).

Almost surely, 2^6444453947 is an apocalyptic number.

6444453947 is a deficient number, since it is larger than the sum of its proper divisors (381318853).

6444453947 is a wasteful number, since it uses less digits than its factorization.

6444453947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41746.

The product of its digits is 5806080, while the sum is 50.

The square root of 6444453947 is about 80277.3563777483. The cubic root of 6444453947 is about 1860.9243052176.

The spelling of 6444453947 in words is "six billion, four hundred forty-four million, four hundred fifty-three thousand, nine hundred forty-seven".