164906319905 has 16 divisors (see below), whose sum is σ = 213932527680. Its totient is φ = 121603747392.

The previous prime is 164906319901. The next prime is 164906319953. The reversal of 164906319905 is 509913609461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 164906319905 - 2² = 164906319901 is a prime.

It is a super-2 number, since 2×164906319905² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164906319901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23453999 + ... + 23461028.

It is an arithmetic number, because the mean of its divisors is an integer number (13370782980).

Almost surely, 2^164906319905 is an apocalyptic number.

It is an amenable number.

164906319905 is a deficient number, since it is larger than the sum of its proper divisors (49026207775).

164906319905 is a wasteful number, since it uses less digits than its factorization.

164906319905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46915088.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 164906319905 in words is "one hundred sixty-four billion, nine hundred six million, three hundred nineteen thousand, nine hundred five".