55871583444 has 72 divisors (see below), whose sum is σ = 149676764328. Its totient is φ = 17512151040.

The previous prime is 55871583437. The next prime is 55871583457. The reversal of 55871583444 is 44438517855.

It is a happy number.

55871583444 is a `hidden beast` number, since 5 + 58 + 7 + 1 + 583 + 4 + 4 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9098870544 + 46772712900 = 95388^2 + 216270^2 .

It is a super-2 number, since 2×55871583444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 629754 + ... + 712974.

It is an arithmetic number, because the mean of its divisors is an integer number (2078843949).

Almost surely, 2^55871583444 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 55871583444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74838382164).

55871583444 is an abundant number, since it is smaller than the sum of its proper divisors (93805180884).

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

55871583444 is a wasteful number, since it uses less digits than its factorization.

55871583444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84345 (or 84340 counting only the distinct ones).

The product of its digits is 10752000, while the sum is 54.

The spelling of 55871583444 in words is "fifty-five billion, eight hundred seventy-one million, five hundred eighty-three thousand, four hundred forty-four".