6556421423600 has 240 divisors, whose sum is σ = 16130602262880. Its totient is φ = 2560352256000.

The previous prime is 6556421423549. The next prime is 6556421423627. The reversal of 6556421423600 is 63241246556.

It is a happy number.

It is a Cunningham number, because it is equal to 2560551²-1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2068922816 + ... + 2068925984.

It is an arithmetic number, because the mean of its divisors is an integer number (67210842762).

Almost surely, 2^{6556421423600} 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 6556421423600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8065301131440).

6556421423600 is an abundant number, since it is smaller than the sum of its proper divisors (9574180839280).

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

6556421423600 is a wasteful number, since it uses less digits than its factorization.

6556421423600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988 (or 3977 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 6556421423600 in words is "six trillion, five hundred fifty-six billion, four hundred twenty-one million, four hundred twenty-three thousand, six hundred".