27216210506 has 4 divisors (see below), whose sum is σ = 40824315762. Its totient is φ = 13608105252.

The previous prime is 27216210481. The next prime is 27216210529. The reversal of 27216210506 is 60501261272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27206853025 + 9357481 = 164945^2 + 3059^2 .

It is a super-2 number, since 2×27216210506² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6804052625 + ... + 6804052628.

Almost surely, 2^27216210506 is an apocalyptic number.

27216210506 is a deficient number, since it is larger than the sum of its proper divisors (13608105256).

27216210506 is a wasteful number, since it uses less digits than its factorization.

27216210506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13608105255.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 27216210506 its reverse (60501261272), we get a palindrome (87717471778).

The spelling of 27216210506 in words is "twenty-seven billion, two hundred sixteen million, two hundred ten thousand, five hundred six".