6459878838 has 32 divisors (see below), whose sum is σ = 15066777600. Its totient is φ = 1845679080.

The previous prime is 6459878813. The next prime is 6459878849. The reversal of 6459878838 is 8388789546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1567398 + ... + 1571513.

It is an arithmetic number, because the mean of its divisors is an integer number (470836800).

Almost surely, 2^6459878838 is an apocalyptic number.

6459878838 is an abundant number, since it is smaller than the sum of its proper divisors (8606898762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6459878838 is a wasteful number, since it uses less digits than its factorization.

6459878838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138937 (or 3138923 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 66.

The square root of 6459878838 is about 80373.3714485090. The cubic root of 6459878838 is about 1862.4078383777.

The spelling of 6459878838 in words is "six billion, four hundred fifty-nine million, eight hundred seventy-eight thousand, eight hundred thirty-eight".