164128931345 has 4 divisors (see below), whose sum is σ = 196954717620. Its totient is φ = 131303145072.

The previous prime is 164128931327. The next prime is 164128931387. The reversal of 164128931345 is 543139821461.

It is a happy number.

164128931345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543139821461 = 839 ⋅647365699.

It can be written as a sum of positive squares in 2 ways, for example, as 28669601041 + 135459330304 = 169321^2 + 368048^2 .

It is a cyclic number.

It is not a de Polignac number, because 164128931345 - 2⁸ = 164128931089 is a prime.

It is a super-2 number, since 2×164128931345² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164128931345.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 16412893130 + ... + 16412893139.

It is an arithmetic number, because the mean of its divisors is an integer number (49238679405).

Almost surely, 2^164128931345 is an apocalyptic number.

It is an amenable number.

164128931345 is a deficient number, since it is larger than the sum of its proper divisors (32825786275).

164128931345 is an equidigital number, since it uses as much as digits as its factorization.

164128931345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32825786274.

The product of its digits is 622080, while the sum is 47.

The spelling of 164128931345 in words is "one hundred sixty-four billion, one hundred twenty-eight million, nine hundred thirty-one thousand, three hundred forty-five".