55511143424 has 88 divisors (see below), whose sum is σ = 121257533088. Its totient is φ = 25190359040.

The previous prime is 55511143417. The next prime is 55511143433. The reversal of 55511143424 is 42434111555.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (88).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7351619 + ... + 7359165.

Almost surely, 2^55511143424 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 55511143424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60628766544).

55511143424 is an abundant number, since it is smaller than the sum of its proper divisors (65746389664).

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

55511143424 is a wasteful number, since it uses less digits than its factorization.

55511143424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8231 (or 8213 counting only the distinct ones).

The product of its digits is 48000, while the sum is 35.

Adding to 55511143424 its reverse (42434111555), we get a palindrome (97945254979).

The spelling of 55511143424 in words is "fifty-five billion, five hundred eleven million, one hundred forty-three thousand, four hundred twenty-four".