164351424162421 has 2 divisors, whose sum is σ = 164351424162422. Its totient is φ = 164351424162420.

The previous prime is 164351424162371. The next prime is 164351424162451. The reversal of 164351424162421 is 124261424153461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115282954260100 + 49068469902321 = 10736990^2 + 7004889^2 .

It is a cyclic number.

It is not a de Polignac number, because 164351424162421 - 2⁷ = 164351424162293 is a prime.

It is a super-3 number, since 3×164351424162421³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164351424162451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82175712081210 + 82175712081211.

It is an arithmetic number, because the mean of its divisors is an integer number (82175712081211).

Almost surely, 2^{164351424162421} is an apocalyptic number.

It is an amenable number.

164351424162421 is a deficient number, since it is larger than the sum of its proper divisors (1).

164351424162421 is an equidigital number, since it uses as much as digits as its factorization.

164351424162421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 46.

The spelling of 164351424162421 in words is "one hundred sixty-four trillion, three hundred fifty-one billion, four hundred twenty-four million, one hundred sixty-two thousand, four hundred twenty-one".