6441478637 has 8 divisors (see below), whose sum is σ = 7269380640. Its totient is φ = 5653962160.

The previous prime is 6441478559. The next prime is 6441478643. The reversal of 6441478637 is 7368741446.

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

It is not a de Polignac number, because 6441478637 - 2¹⁰ = 6441477613 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 (6441478237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10096043 + ... + 10096680.

It is an arithmetic number, because the mean of its divisors is an integer number (908672580).

Almost surely, 2^6441478637 is an apocalyptic number.

It is an amenable number.

6441478637 is a deficient number, since it is larger than the sum of its proper divisors (827902003).

6441478637 is a wasteful number, since it uses less digits than its factorization.

6441478637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20192763.

The product of its digits is 2709504, while the sum is 50.

The square root of 6441478637 is about 80258.8227984936. The cubic root of 6441478637 is about 1860.6378739673.

The spelling of 6441478637 in words is "six billion, four hundred forty-one million, four hundred seventy-eight thousand, six hundred thirty-seven".