55811860669440 has 1408 divisors, whose sum is σ = 211214241792000. Its totient is φ = 13955029401600.

The previous prime is 55811860669403. The next prime is 55811860669451. The reversal of 55811860669440 is 4496606811855.

55811860669440 is a `hidden beast` number, since 5 + 5 + 8 + 1 + 18 + 606 + 6 + 9 + 4 + 4 + 0 = 666.

55811860669440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55811860669440² (a number of 28 digits) contains 22 as substring.

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, 17951706606 + ... + 17951709714.

Almost surely, 2^{55811860669440} 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 55811860669440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105607120896000).

55811860669440 is an abundant number, since it is smaller than the sum of its proper divisors (155402381122560).

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

55811860669440 is a wasteful number, since it uses less digits than its factorization.

55811860669440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304 (or 3280 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 63.

The spelling of 55811860669440 in words is "fifty-five trillion, eight hundred eleven billion, eight hundred sixty million, six hundred sixty-nine thousand, four hundred forty".