27212372657 has 2 divisors, whose sum is σ = 27212372658. Its totient is φ = 27212372656.

The previous prime is 27212372653. The next prime is 27212372683. The reversal of 27212372657 is 75627321272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24448136881 + 2764235776 = 156359^2 + 52576^2 .

It is a cyclic number.

It is not a de Polignac number, because 27212372657 - 2² = 27212372653 is a prime.

It is not a weakly prime, because it can be changed into another prime (27212372653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13606186328 + 13606186329.

It is an arithmetic number, because the mean of its divisors is an integer number (13606186329).

Almost surely, 2^27212372657 is an apocalyptic number.

It is an amenable number.

27212372657 is a deficient number, since it is larger than the sum of its proper divisors (1).

27212372657 is an equidigital number, since it uses as much as digits as its factorization.

27212372657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 44.

The spelling of 27212372657 in words is "twenty-seven billion, two hundred twelve million, three hundred seventy-two thousand, six hundred fifty-seven".