55511544 has 64 divisors (see below), whose sum is σ = 155514240. Its totient is φ = 16364160.

The previous prime is 55511543. The next prime is 55511557. The reversal of 55511544 is 44511555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55511543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6927 + ... + 12609.

It is an arithmetic number, because the mean of its divisors is an integer number (2429910).

Almost surely, 2^55511544 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 55511544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77757120).

55511544 is an abundant number, since it is smaller than the sum of its proper divisors (100002696).

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

55511544 is a wasteful number, since it uses less digits than its factorization.

55511544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5740 (or 5736 counting only the distinct ones).

The product of its digits is 10000, while the sum is 30.

The square root of 55511544 is about 7450.6069551413. The cubic root of 55511544 is about 381.4706262558.

The spelling of 55511544 in words is "fifty-five million, five hundred eleven thousand, five hundred forty-four".