27216661272 has 32 divisors (see below), whose sum is σ = 68045702400. Its totient is φ = 9071680544.

The previous prime is 27216661271. The next prime is 27216661279.

27216661272 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27216661271) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 740629 + ... + 776507.

It is an arithmetic number, because the mean of its divisors is an integer number (2126428200).

Almost surely, 2^27216661272 is an apocalyptic number.

It is an amenable number.

27216661272 is an abundant number, since it is smaller than the sum of its proper divisors (40829041128).

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

27216661272 is a wasteful number, since it uses less digits than its factorization.

27216661272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67495 (or 67491 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The spelling of 27216661272 in words is "twenty-seven billion, two hundred sixteen million, six hundred sixty-one thousand, two hundred seventy-two".