164447966638051 has 2 divisors, whose sum is σ = 164447966638052. Its totient is φ = 164447966638050.

The previous prime is 164447966638013. The next prime is 164447966638091. The reversal of 164447966638051 is 150836669744461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164447966638051 is a prime.

It is a super-3 number, since 3×164447966638051³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (164447966638091) 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, 82223983319025 + 82223983319026.

It is an arithmetic number, because the mean of its divisors is an integer number (82223983319026).

Almost surely, 2^{164447966638051} is an apocalyptic number.

164447966638051 is a deficient number, since it is larger than the sum of its proper divisors (1).

164447966638051 is an equidigital number, since it uses as much as digits as its factorization.

164447966638051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 627056640, while the sum is 70.

The spelling of 164447966638051 in words is "one hundred sixty-four trillion, four hundred forty-seven billion, nine hundred sixty-six million, six hundred thirty-eight thousand, fifty-one".