6559989897600 has 1344 divisors, whose sum is σ = 25161128178480. Its totient is φ = 1688076288000.

The previous prime is 6559989897581. The next prime is 6559989897613. The reversal of 6559989897600 is 67989899556.

It is a happy number.

It is a super-2 number, since 2×6559989897600² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 6559989897600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 10233993280 + ... + 10233993920.

Almost surely, 2^{6559989897600} is an apocalyptic number.

6559989897600 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 6559989897600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12580564089240).

6559989897600 is an abundant number, since it is smaller than the sum of its proper divisors (18601138280880).

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

6559989897600 is a wasteful number, since it uses less digits than its factorization.

6559989897600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 2645395200, while the sum is 81.

The spelling of 6559989897600 in words is "six trillion, five hundred fifty-nine billion, nine hundred eighty-nine million, eight hundred ninety-seven thousand, six hundred".