164217440851 has 2 divisors, whose sum is σ = 164217440852. Its totient is φ = 164217440850.

The previous prime is 164217440791. The next prime is 164217440861. The reversal of 164217440851 is 158044712461.

164217440851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164217440851 - 2²⁹ = 163680569939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164217440798 and 164217440807.

It is not a weakly prime, because it can be changed into another prime (164217440861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82108720425 + 82108720426.

It is an arithmetic number, because the mean of its divisors is an integer number (82108720426).

Almost surely, 2^164217440851 is an apocalyptic number.

164217440851 is a deficient number, since it is larger than the sum of its proper divisors (1).

164217440851 is an equidigital number, since it uses as much as digits as its factorization.

164217440851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 164217440851 in words is "one hundred sixty-four billion, two hundred seventeen million, four hundred forty thousand, eight hundred fifty-one".