5509440215538 has 128 divisors (see below), whose sum is σ = 12854686580736. Its totient is φ = 1541649542400.

The previous prime is 5509440215527. The next prime is 5509440215603. The reversal of 5509440215538 is 8355120449055.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 878555343 + ... + 878561613.

It is an arithmetic number, because the mean of its divisors is an integer number (100427238912).

Almost surely, 2^{5509440215538} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5509440215538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6427343290368).

5509440215538 is an abundant number, since it is smaller than the sum of its proper divisors (7345246365198).

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

5509440215538 is a wasteful number, since it uses less digits than its factorization.

5509440215538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7768.

The product of its (nonzero) digits is 4320000, while the sum is 51.

The spelling of 5509440215538 in words is "five trillion, five hundred nine billion, four hundred forty million, two hundred fifteen thousand, five hundred thirty-eight".