6444723886 has 8 divisors (see below), whose sum is σ = 10175879880. Its totient is φ = 3052763928.

The previous prime is 6444723881. The next prime is 6444723893. The reversal of 6444723886 is 6883274446.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444723881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84798961 + ... + 84799036.

It is an arithmetic number, because the mean of its divisors is an integer number (1271984985).

Almost surely, 2^6444723886 is an apocalyptic number.

6444723886 is a deficient number, since it is larger than the sum of its proper divisors (3731155994).

6444723886 is a wasteful number, since it uses less digits than its factorization.

6444723886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169598018.

The product of its digits is 6193152, while the sum is 52.

The square root of 6444723886 is about 80279.0376499370. The cubic root of 6444723886 is about 1860.9502877154.

The spelling of 6444723886 in words is "six billion, four hundred forty-four million, seven hundred twenty-three thousand, eight hundred eighty-six".