5501551205521 has 8 divisors (see below), whose sum is σ = 6309862493184. Its totient is φ = 4698833768160.

The previous prime is 5501551205519. The next prime is 5501551205621. The reversal of 5501551205521 is 1255021551055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5501551205521 - 2¹ = 5501551205519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5501551205621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398460465 + ... + 1398464398.

It is an arithmetic number, because the mean of its divisors is an integer number (788732811648).

Almost surely, 2^{5501551205521} is an apocalyptic number.

It is an amenable number.

5501551205521 is a deficient number, since it is larger than the sum of its proper divisors (808311287663).

5501551205521 is a wasteful number, since it uses less digits than its factorization.

5501551205521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796925151.

The product of its (nonzero) digits is 62500, while the sum is 37.

Adding to 5501551205521 its reverse (1255021551055), we get a palindrome (6756572756576).

The spelling of 5501551205521 in words is "five trillion, five hundred one billion, five hundred fifty-one million, two hundred five thousand, five hundred twenty-one".