27216326417 has 6 divisors (see below), whose sum is σ = 31659808338. Its totient is φ = 23328279744.

The previous prime is 27216326363. The next prime is 27216326483. The reversal of 27216326417 is 71462361272.

It can be written as a sum of positive squares in only one way, i.e., 14848884736 + 12367441681 = 121856^2 + 111209^2 .

It is not a de Polignac number, because 27216326417 - 2¹⁰ = 27216325393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27216326497) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277717568 + ... + 277717665.

It is an arithmetic number, because the mean of its divisors is an integer number (5276634723).

Almost surely, 2^27216326417 is an apocalyptic number.

It is an amenable number.

27216326417 is a deficient number, since it is larger than the sum of its proper divisors (4443481921).

27216326417 is an equidigital number, since it uses as much as digits as its factorization.

27216326417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555435247 (or 555435240 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

Adding to 27216326417 its reverse (71462361272), we get a palindrome (98678687689).

The spelling of 27216326417 in words is "twenty-seven billion, two hundred sixteen million, three hundred twenty-six thousand, four hundred seventeen".