6639142484544 has 112 divisors (see below), whose sum is σ = 17680247697600. Its totient is φ = 2198672087040.

The previous prime is 6639142484509. The next prime is 6639142484551. The reversal of 6639142484544 is 4454842419366.

It is a super-3 number, since 3×6639142484544³ (a number of 39 digits) contains 333 as substring.

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, 89500782 + ... + 89574930.

Almost surely, 2^{6639142484544} is an apocalyptic number.

6639142484544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6639142484544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8840123848800).

6639142484544 is an abundant number, since it is smaller than the sum of its proper divisors (11041105213056).

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

6639142484544 is a wasteful number, since it uses less digits than its factorization.

6639142484544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77188 (or 77178 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 60.

The spelling of 6639142484544 in words is "six trillion, six hundred thirty-nine billion, one hundred forty-two million, four hundred eighty-four thousand, five hundred forty-four".