6444167447 has 4 divisors (see below), whose sum is σ = 6446003256. Its totient is φ = 6442331640.

The previous prime is 6444167417. The next prime is 6444167473. The reversal of 6444167447 is 7447614446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6444167447 - 2⁶ = 6444167383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444167417) 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, 912629 + ... + 919662.

It is an arithmetic number, because the mean of its divisors is an integer number (1611500814).

Almost surely, 2^6444167447 is an apocalyptic number.

6444167447 is a deficient number, since it is larger than the sum of its proper divisors (1835809).

6444167447 is a wasteful number, since it uses less digits than its factorization.

6444167447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835808.

The product of its digits is 1806336, while the sum is 47.

The square root of 6444167447 is about 80275.5719194825. The cubic root of 6444167447 is about 1860.8967278765.

The spelling of 6444167447 in words is "six billion, four hundred forty-four million, one hundred sixty-seven thousand, four hundred forty-seven".