6616213963500 has 96 divisors (see below), whose sum is σ = 19273204274688. Its totient is φ = 1763702001600.

The previous prime is 6616213963487. The next prime is 6616213963519. The reversal of 6616213963500 is 53693126166.

It is a self number, because there is not a number n which added to its sum of digits gives 6616213963500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3488769 + ... + 5040231.

It is an arithmetic number, because the mean of its divisors is an integer number (200762544528).

Almost surely, 2^{6616213963500} is an apocalyptic number.

6616213963500 is a gapful number since it is divisible by the number (60) 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 6616213963500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9636602137344).

6616213963500 is an abundant number, since it is smaller than the sum of its proper divisors (12656990311188).

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

6616213963500 is a wasteful number, since it uses less digits than its factorization.

6616213963500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554328 (or 1554316 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 48.

The spelling of 6616213963500 in words is "six trillion, six hundred sixteen billion, two hundred thirteen million, nine hundred sixty-three thousand, five hundred".