5555899399680 has 2560 divisors, whose sum is σ = 24640937164800. Its totient is φ = 1159358054400.

The previous prime is 5555899399667. The next prime is 5555899399747. The reversal of 5555899399680 is 869939985555.

5555899399680 is a `hidden beast` number, since 55 + 558 + 9 + 9 + 3 + 9 + 9 + 6 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2560).

It is a self number, because there is not a number n which added to its sum of digits gives 5555899399680.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 23053524360 + ... + 23053524600.

It is an arithmetic number, because the mean of its divisors is an integer number (9625366080).

Almost surely, 2^{5555899399680} 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 5555899399680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12320468582400).

5555899399680 is an abundant number, since it is smaller than the sum of its proper divisors (19085037765120).

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

5555899399680 is a wasteful number, since it uses less digits than its factorization.

5555899399680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 4723920000, while the sum is 81.

The spelling of 5555899399680 in words is "five trillion, five hundred fifty-five billion, eight hundred ninety-nine million, three hundred ninety-nine thousand, six hundred eighty".