6138643356 has 36 divisors (see below), whose sum is σ = 16429900032. Its totient is φ = 1925848704.

The previous prime is 6138643349. The next prime is 6138643403. The reversal of 6138643356 is 6533468316.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5014620 + ... + 5015843.

It is an arithmetic number, because the mean of its divisors is an integer number (456386112).

Almost surely, 2^6138643356 is an apocalyptic number.

It is an amenable number.

6138643356 is an abundant number, since it is smaller than the sum of its proper divisors (10291256676).

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

6138643356 is a wasteful number, since it uses less digits than its factorization.

6138643356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10030490 (or 10030485 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 6138643356 is about 78349.4949313651. The cubic root of 6138643356 is about 1831.0103567005.

The spelling of 6138643356 in words is "six billion, one hundred thirty-eight million, six hundred forty-three thousand, three hundred fifty-six".