55866442604544 has 1792 divisors, whose sum is σ = 202417506385920. Its totient is φ = 14996275200000.

The previous prime is 55866442604521. The next prime is 55866442604563. The reversal of 55866442604544 is 44540624466855.

It is a happy number.

55866442604544 is a `hidden beast` number, since 5 + 5 + 8 + 6 + 64 + 4 + 26 + 0 + 4 + 544 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 222575468419 + ... + 222575468669.

It is an arithmetic number, because the mean of its divisors is an integer number (112956197760).

Almost surely, 2^{55866442604544} is an apocalyptic number.

55866442604544 is a gapful number since it is divisible by the number (54) 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 55866442604544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101208753192960).

55866442604544 is an abundant number, since it is smaller than the sum of its proper divisors (146551063781376).

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

55866442604544 is a wasteful number, since it uses less digits than its factorization.

55866442604544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 442368000, while the sum is 63.

The spelling of 55866442604544 in words is "fifty-five trillion, eight hundred sixty-six billion, four hundred forty-two million, six hundred four thousand, five hundred forty-four".