164840645326 has 16 divisors (see below), whose sum is σ = 282798236160. Its totient is φ = 70592422680.

The previous prime is 164840645309. The next prime is 164840645327. The reversal of 164840645326 is 623546048461.

It is a self number, because there is not a number n which added to its sum of digits gives 164840645326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164840645327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4444890 + ... + 4481821.

It is an arithmetic number, because the mean of its divisors is an integer number (17674889760).

Almost surely, 2^164840645326 is an apocalyptic number.

164840645326 is a deficient number, since it is larger than the sum of its proper divisors (117957590834).

164840645326 is a wasteful number, since it uses less digits than its factorization.

164840645326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928039.

The product of its (nonzero) digits is 3317760, while the sum is 49.

The spelling of 164840645326 in words is "one hundred sixty-four billion, eight hundred forty million, six hundred forty-five thousand, three hundred twenty-six".