6138543616 has 80 divisors (see below), whose sum is σ = 12970919808. Its totient is φ = 2897510400.

The previous prime is 6138543589. The next prime is 6138543641. The reversal of 6138543616 is 6163458316.

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, 646036 + ... + 655468.

Almost surely, 2^6138543616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6138543616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6485459904).

6138543616 is an abundant number, since it is smaller than the sum of its proper divisors (6832376192).

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

6138543616 is an equidigital number, since it uses as much as digits as its factorization.

6138543616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9523 (or 9507 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 6138543616 is about 78348.8584218047. The cubic root of 6138543616 is about 1831.0004399621. Note that the first 3 decimals are identical.

The spelling of 6138543616 in words is "six billion, one hundred thirty-eight million, five hundred forty-three thousand, six hundred sixteen".