164345122050521 has 4 divisors (see below), whose sum is σ = 164345160120372. Its totient is φ = 164345083980672.

The previous prime is 164345122050491. The next prime is 164345122050539. The reversal of 164345122050521 is 125050221543461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143338840656400 + 21006281394121 = 11972420^2 + 4583261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164345122050521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164345122052521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11588516 + ... + 21517061.

It is an arithmetic number, because the mean of its divisors is an integer number (41086290030093).

Almost surely, 2^{164345122050521} is an apocalyptic number.

It is an amenable number.

164345122050521 is a deficient number, since it is larger than the sum of its proper divisors (38069851).

164345122050521 is an equidigital number, since it uses as much as digits as its factorization.

164345122050521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38069850.

The product of its (nonzero) digits is 288000, while the sum is 41.

Adding to 164345122050521 its reverse (125050221543461), we get a palindrome (289395343593982).

The spelling of 164345122050521 in words is "one hundred sixty-four trillion, three hundred forty-five billion, one hundred twenty-two million, fifty thousand, five hundred twenty-one".