164280650221 has 2 divisors, whose sum is σ = 164280650222. Its totient is φ = 164280650220.

The previous prime is 164280650189. The next prime is 164280650227. The reversal of 164280650221 is 122056082461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163813658121 + 466992100 = 404739^2 + 21610^2 .

It is a cyclic number.

It is not a de Polignac number, because 164280650221 - 2⁵ = 164280650189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164280650227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82140325110 + 82140325111.

It is an arithmetic number, because the mean of its divisors is an integer number (82140325111).

Almost surely, 2^164280650221 is an apocalyptic number.

It is an amenable number.

164280650221 is a deficient number, since it is larger than the sum of its proper divisors (1).

164280650221 is an equidigital number, since it uses as much as digits as its factorization.

164280650221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 164280650221 in words is "one hundred sixty-four billion, two hundred eighty million, six hundred fifty thousand, two hundred twenty-one".