555447797856 has 432 divisors, whose sum is σ = 1948395299760. Its totient is φ = 149239480320.

The previous prime is 555447797833. The next prime is 555447797867. The reversal of 555447797856 is 658797744555.

555447797856 is a `hidden beast` number, since 5 + 5 + 544 + 7 + 7 + 9 + 78 + 5 + 6 = 666.

It is a super-2 number, since 2×555447797856² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 36725976 + ... + 36741096.

It is an arithmetic number, because the mean of its divisors is an integer number (4510174305).

Almost surely, 2^555447797856 is an apocalyptic number.

555447797856 is a gapful number since it is divisible by the number (56) 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 555447797856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (974197649880).

555447797856 is an abundant number, since it is smaller than the sum of its proper divisors (1392947501904).

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

555447797856 is a wasteful number, since it uses less digits than its factorization.

555447797856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15307 (or 15289 counting only the distinct ones).

The product of its digits is 1481760000, while the sum is 72.

The spelling of 555447797856 in words is "five hundred fifty-five billion, four hundred forty-seven million, seven hundred ninety-seven thousand, eight hundred fifty-six".