6439113874 has 4 divisors (see below), whose sum is σ = 9658670814. Its totient is φ = 3219556936.

The previous prime is 6439113869. The next prime is 6439113893. The reversal of 6439113874 is 4783119346.

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

It can be written as a sum of positive squares in only one way, i.e., 5296200625 + 1142913249 = 72775^2 + 33807^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609778467 + ... + 1609778470.

Almost surely, 2^6439113874 is an apocalyptic number.

6439113874 is a deficient number, since it is larger than the sum of its proper divisors (3219556940).

6439113874 is a wasteful number, since it uses less digits than its factorization.

6439113874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219556939.

The product of its digits is 435456, while the sum is 46.

The square root of 6439113874 is about 80244.0893399632. The cubic root of 6439113874 is about 1860.4101567826.

The spelling of 6439113874 in words is "six billion, four hundred thirty-nine million, one hundred thirteen thousand, eight hundred seventy-four".