27625650161 has 2 divisors, whose sum is σ = 27625650162. Its totient is φ = 27625650160.

The previous prime is 27625650137. The next prime is 27625650163. The reversal of 27625650161 is 16105652672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24158795761 + 3466854400 = 155431^2 + 58880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27625650161 is a prime.

Together with 27625650163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27625650163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13812825080 + 13812825081.

It is an arithmetic number, because the mean of its divisors is an integer number (13812825081).

Almost surely, 2^27625650161 is an apocalyptic number.

It is an amenable number.

27625650161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27625650161 is an equidigital number, since it uses as much as digits as its factorization.

27625650161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 27625650161 in words is "twenty-seven billion, six hundred twenty-five million, six hundred fifty thousand, one hundred sixty-one".