5515544400 has 60 divisors (see below), whose sum is σ = 17668131072. Its totient is φ = 1470811520.

The previous prime is 5515544389. The next prime is 5515544429. The reversal of 5515544400 is 44455155.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2296944 + ... + 2299343.

Almost surely, 2^5515544400 is an apocalyptic number.

5515544400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5515544400 is an abundant number, since it is smaller than the sum of its proper divisors (12152586672).

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

5515544400 is a wasteful number, since it uses less digits than its factorization.

5515544400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4596308 (or 4596297 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 33.

The square root of 5515544400 is about 74266.7112507347. The cubic root of 5515544400 is about 1766.8355473223.

Adding to 5515544400 its reverse (44455155), we get a palindrome (5559999555).

The spelling of 5515544400 in words is "five billion, five hundred fifteen million, five hundred forty-four thousand, four hundred".