67238870161 has 2 divisors, whose sum is σ = 67238870162. Its totient is φ = 67238870160.

The previous prime is 67238870159. The next prime is 67238870189. The reversal of 67238870161 is 16107883276.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57780140625 + 9458729536 = 240375^2 + 97256^2 .

It is a cyclic number.

It is not a de Polignac number, because 67238870161 - 2¹ = 67238870159 is a prime.

Together with 67238870159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67238874161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33619435080 + 33619435081.

It is an arithmetic number, because the mean of its divisors is an integer number (33619435081).

Almost surely, 2^67238870161 is an apocalyptic number.

It is an amenable number.

67238870161 is a deficient number, since it is larger than the sum of its proper divisors (1).

67238870161 is an equidigital number, since it uses as much as digits as its factorization.

67238870161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 67238870161 in words is "sixty-seven billion, two hundred thirty-eight million, eight hundred seventy thousand, one hundred sixty-one".