55144424240 has 40 divisors (see below), whose sum is σ = 128272258800. Its totient is φ = 22047193856.

The previous prime is 55144424227. The next prime is 55144424267. The reversal of 55144424240 is 4242444155.

It is a happy number.

55144424240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×55144424240² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55144424240.

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, 3722 + ... + 332118.

It is an arithmetic number, because the mean of its divisors is an integer number (3206806470).

Almost surely, 2^55144424240 is an apocalyptic number.

It is an amenable number.

55144424240 is an abundant number, since it is smaller than the sum of its proper divisors (73127834560).

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

55144424240 is a wasteful number, since it uses less digits than its factorization.

55144424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330509 (or 330503 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 35.

Adding to 55144424240 its reverse (4242444155), we get a palindrome (59386868395).

The spelling of 55144424240 in words is "fifty-five billion, one hundred forty-four million, four hundred twenty-four thousand, two hundred forty".