5581121285376 has 864 divisors, whose sum is σ = 20569125857280. Its totient is φ = 1424181657600.

The previous prime is 5581121285371. The next prime is 5581121285381. The reversal of 5581121285376 is 6735821211855.

5581121285376 is a `hidden beast` number, since 5 + 5 + 81 + 1 + 2 + 1 + 28 + 537 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (5581121285371) and next prime (5581121285381).

It is a super-2 number, since 2×5581121285376² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581121285371) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1098427156 + ... + 1098432236.

Almost surely, 2^{5581121285376} is an apocalyptic number.

5581121285376 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 5581121285376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10284562928640).

5581121285376 is an abundant number, since it is smaller than the sum of its proper divisors (14988004571904).

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

5581121285376 is a wasteful number, since it uses less digits than its factorization.

5581121285376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180 (or 5137 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 54.

The spelling of 5581121285376 in words is "five trillion, five hundred eighty-one billion, one hundred twenty-one million, two hundred eighty-five thousand, three hundred seventy-six".