27211605697 has 2 divisors, whose sum is σ = 27211605698. Its totient is φ = 27211605696.

The previous prime is 27211605571. The next prime is 27211605767. The reversal of 27211605697 is 79650611272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21373270416 + 5838335281 = 146196^2 + 76409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27211605697 is a prime.

It is not a weakly prime, because it can be changed into another prime (27211605097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13605802848 + 13605802849.

It is an arithmetic number, because the mean of its divisors is an integer number (13605802849).

Almost surely, 2^27211605697 is an apocalyptic number.

It is an amenable number.

27211605697 is a deficient number, since it is larger than the sum of its proper divisors (1).

27211605697 is an equidigital number, since it uses as much as digits as its factorization.

27211605697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 27211605697 in words is "twenty-seven billion, two hundred eleven million, six hundred five thousand, six hundred ninety-seven".