6444491801 has 16 divisors (see below), whose sum is σ = 7835693760. Its totient is φ = 5223790080.

The previous prime is 6444491771. The next prime is 6444491821. The reversal of 6444491801 is 1081944446.

It is a de Polignac number, because none of the positive numbers 2^k-6444491801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6444491821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903356 + ... + 910461.

It is an arithmetic number, because the mean of its divisors is an integer number (489730860).

Almost surely, 2^6444491801 is an apocalyptic number.

It is an amenable number.

6444491801 is a deficient number, since it is larger than the sum of its proper divisors (1391201959).

6444491801 is a wasteful number, since it uses less digits than its factorization.

6444491801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813864.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 6444491801 is about 80277.5921474978. The cubic root of 6444491801 is about 1860.9279488307.

The spelling of 6444491801 in words is "six billion, four hundred forty-four million, four hundred ninety-one thousand, eight hundred one".