6444025861 has 8 divisors (see below), whose sum is σ = 7931108864. Its totient is φ = 5098569840.

The previous prime is 6444025859. The next prime is 6444025867. The reversal of 6444025861 is 1685204446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6444025861 - 2¹ = 6444025859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444025867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35406645 + ... + 35406826.

It is an arithmetic number, because the mean of its divisors is an integer number (991388608).

Almost surely, 2^6444025861 is an apocalyptic number.

It is an amenable number.

6444025861 is a deficient number, since it is larger than the sum of its proper divisors (1487083003).

6444025861 is a wasteful number, since it uses less digits than its factorization.

6444025861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70813491.

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 6444025861 is about 80274.6900398874. The cubic root of 6444025861 is about 1860.8830990741.

The spelling of 6444025861 in words is "six billion, four hundred forty-four million, twenty-five thousand, eight hundred sixty-one".