55145424400 has 60 divisors (see below), whose sum is σ = 144531155664. Its totient is φ = 20052880000.

The previous prime is 55145424377. The next prime is 55145424403. The reversal of 55145424400 is 442454155.

It is a super-2 number, since 2×55145424400² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55145424403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6262126 + ... + 6270925.

Almost surely, 2^55145424400 is an apocalyptic number.

55145424400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55145424400 is an abundant number, since it is smaller than the sum of its proper divisors (89385731264).

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

55145424400 is a wasteful number, since it uses less digits than its factorization.

55145424400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12533080 (or 12533069 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 55145424400 its reverse (442454155), we get a palindrome (55587878555).

The spelling of 55145424400 in words is "fifty-five billion, one hundred forty-five million, four hundred twenty-four thousand, four hundred".