55004253440 has 144 divisors (see below), whose sum is σ = 145569166848. Its totient is φ = 19806978048.

The previous prime is 55004253431. The next prime is 55004253487. The reversal of 55004253440 is 4435240055.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 55004253397 and 55004253406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445529 + ... + 555431.

It is an arithmetic number, because the mean of its divisors is an integer number (1010896992).

Almost surely, 2^55004253440 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 55004253440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72784583424).

55004253440 is an abundant number, since it is smaller than the sum of its proper divisors (90564913408).

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

55004253440 is a wasteful number, since it uses less digits than its factorization.

55004253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109964 (or 109950 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 32.

Adding to 55004253440 its reverse (4435240055), we get a palindrome (59439493495).

The spelling of 55004253440 in words is "fifty-five billion, four million, two hundred fifty-three thousand, four hundred forty".