164144091608 has 64 divisors (see below), whose sum is σ = 360455631360. Its totient is φ = 68608705536.

The previous prime is 164144091599. The next prime is 164144091641. The reversal of 164144091608 is 806190441461.

It is a Cunningham number, because it is equal to 405147²-1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1569941 + ... + 1671227.

It is an arithmetic number, because the mean of its divisors is an integer number (5632119240).

Almost surely, 2^164144091608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164144091608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180227815680).

164144091608 is an abundant number, since it is smaller than the sum of its proper divisors (196311539752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164144091608 is a wasteful number, since it uses less digits than its factorization.

164144091608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102016 (or 102012 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 164144091608 in words is "one hundred sixty-four billion, one hundred forty-four million, ninety-one thousand, six hundred eight".