6439375137 has 8 divisors (see below), whose sum is σ = 9246282304. Its totient is φ = 3962692368.

The previous prime is 6439375133. The next prime is 6439375157. The reversal of 6439375137 is 7315739346.

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

It is not a de Polignac number, because 6439375137 - 2² = 6439375133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6439375133) 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, 82556053 + ... + 82556130.

It is an arithmetic number, because the mean of its divisors is an integer number (1155785288).

Almost surely, 2^6439375137 is an apocalyptic number.

It is an amenable number.

6439375137 is a deficient number, since it is larger than the sum of its proper divisors (2806907167).

6439375137 is a wasteful number, since it uses less digits than its factorization.

6439375137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165112199.

The product of its digits is 1428840, while the sum is 48.

The square root of 6439375137 is about 80245.7172502059. The cubic root of 6439375137 is about 1860.4353181001.

The spelling of 6439375137 in words is "six billion, four hundred thirty-nine million, three hundred seventy-five thousand, one hundred thirty-seven".