6138839816 has 32 divisors (see below), whose sum is σ = 11578071960. Its totient is φ = 3051397632.

The previous prime is 6138839803. The next prime is 6138839879. The reversal of 6138839816 is 6189388316.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6035736100 + 103103716 = 77690^2 + 10154^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1364066 + ... + 1368558.

Almost surely, 2^6138839816 is an apocalyptic number.

It is an amenable number.

6138839816 is a deficient number, since it is larger than the sum of its proper divisors (5439232144).

6138839816 is a wasteful number, since it uses less digits than its factorization.

6138839816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465 (or 5461 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 53.

The square root of 6138839816 is about 78350.7486626644. The cubic root of 6138839816 is about 1831.0298895971.

The spelling of 6138839816 in words is "six billion, one hundred thirty-eight million, eight hundred thirty-nine thousand, eight hundred sixteen".