164645025223 has 4 divisors (see below), whose sum is σ = 188165743120. Its totient is φ = 141124307328.

The previous prime is 164645025203. The next prime is 164645025229. The reversal of 164645025223 is 322520546461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322520546461 = 3571 ⋅90316591.

It is a cyclic number.

It is not a de Polignac number, because 164645025223 - 2⁹ = 164645024711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164645025229) 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, 11760358938 + ... + 11760358951.

It is an arithmetic number, because the mean of its divisors is an integer number (47041435780).

Almost surely, 2^164645025223 is an apocalyptic number.

164645025223 is a deficient number, since it is larger than the sum of its proper divisors (23520717897).

164645025223 is an equidigital number, since it uses as much as digits as its factorization.

164645025223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23520717896.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 164645025223 in words is "one hundred sixty-four billion, six hundred forty-five million, twenty-five thousand, two hundred twenty-three".