555971221440 has 280 divisors, whose sum is σ = 1991928319920. Its totient is φ = 147191427072.

The previous prime is 555971221439. The next prime is 555971221451. The reversal of 555971221440 is 44122179555.

555971221440 is a `hidden beast` number, since 5 + 5 + 597 + 1 + 2 + 2 + 14 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 39 ways as a sum of consecutive naturals, for example, 3525724 + ... + 3680036.

It is an arithmetic number, because the mean of its divisors is an integer number (7114029714).

Almost surely, 2^555971221440 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 555971221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995964159960).

555971221440 is an abundant number, since it is smaller than the sum of its proper divisors (1435957098480).

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

555971221440 is a wasteful number, since it uses less digits than its factorization.

555971221440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154481 (or 154462 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 555971221440 in words is "five hundred fifty-five billion, nine hundred seventy-one million, two hundred twenty-one thousand, four hundred forty".