27520455216 has 80 divisors (see below), whose sum is σ = 72521858304. Its totient is φ = 8989723392.

The previous prime is 27520455211. The next prime is 27520455217. The reversal of 27520455216 is 61255402572.

It is not an unprimeable number, because it can be changed into a prime (27520455211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2301445 + ... + 2313371.

Almost surely, 2^27520455216 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 27520455216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36260929152).

27520455216 is an abundant number, since it is smaller than the sum of its proper divisors (45001403088).

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

27520455216 is a wasteful number, since it uses less digits than its factorization.

27520455216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12898 (or 12892 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 39.

Adding to 27520455216 its reverse (61255402572), we get a palindrome (88775857788).

The spelling of 27520455216 in words is "twenty-seven billion, five hundred twenty million, four hundred fifty-five thousand, two hundred sixteen".