67648871161 has 2 divisors, whose sum is σ = 67648871162. Its totient is φ = 67648871160.

The previous prime is 67648871159. The next prime is 67648871177. The reversal of 67648871161 is 16117884676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49698230761 + 17950640400 = 222931^2 + 133980^2 .

It is a cyclic number.

It is not a de Polignac number, because 67648871161 - 2¹ = 67648871159 is a prime.

Together with 67648871159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67648871131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33824435580 + 33824435581.

It is an arithmetic number, because the mean of its divisors is an integer number (33824435581).

Almost surely, 2^67648871161 is an apocalyptic number.

It is an amenable number.

67648871161 is a deficient number, since it is larger than the sum of its proper divisors (1).

67648871161 is an equidigital number, since it uses as much as digits as its factorization.

67648871161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 55.

The spelling of 67648871161 in words is "sixty-seven billion, six hundred forty-eight million, eight hundred seventy-one thousand, one hundred sixty-one".