164256661267 has 2 divisors, whose sum is σ = 164256661268. Its totient is φ = 164256661266.

The previous prime is 164256661243. The next prime is 164256661297. The reversal of 164256661267 is 762166652461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164256661267 - 2⁷ = 164256661139 is a prime.

It is not a weakly prime, because it can be changed into another prime (164256661297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82128330633 + 82128330634.

It is an arithmetic number, because the mean of its divisors is an integer number (82128330634).

Almost surely, 2^164256661267 is an apocalyptic number.

164256661267 is a deficient number, since it is larger than the sum of its proper divisors (1).

164256661267 is an equidigital number, since it uses as much as digits as its factorization.

164256661267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 52.

The spelling of 164256661267 in words is "one hundred sixty-four billion, two hundred fifty-six million, six hundred sixty-one thousand, two hundred sixty-seven".