55331532844 has 72 divisors (see below), whose sum is σ = 115337634048. Its totient is φ = 23151935520.

The previous prime is 55331532811. The next prime is 55331532889. The reversal of 55331532844 is 44823513355.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55331532844.

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, 1414047 + ... + 1452649.

It is an arithmetic number, because the mean of its divisors is an integer number (1601911584).

Almost surely, 2^55331532844 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 55331532844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57668817024).

55331532844 is an abundant number, since it is smaller than the sum of its proper divisors (60006101204).

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

55331532844 is a wasteful number, since it uses less digits than its factorization.

55331532844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38795 (or 38786 counting only the distinct ones).

The product of its digits is 864000, while the sum is 43.

The spelling of 55331532844 in words is "fifty-five billion, three hundred thirty-one million, five hundred thirty-two thousand, eight hundred forty-four".