6138744668 has 24 divisors (see below), whose sum is σ = 12281277792. Its totient is φ = 2630078784.

The previous prime is 6138744653. The next prime is 6138744673. The reversal of 6138744668 is 8664478316.

It is a congruent number.

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, 63446 + ... + 127682.

It is an arithmetic number, because the mean of its divisors is an integer number (511719908).

Almost surely, 2^6138744668 is an apocalyptic number.

It is an amenable number.

6138744668 is an abundant number, since it is smaller than the sum of its proper divisors (6142533124).

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

6138744668 is a wasteful number, since it uses less digits than its factorization.

6138744668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67661 (or 67659 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 53.

The square root of 6138744668 is about 78350.1414676451. The cubic root of 6138744668 is about 1831.0204296265.

The spelling of 6138744668 in words is "six billion, one hundred thirty-eight million, seven hundred forty-four thousand, six hundred sixty-eight".