164905989695 has 16 divisors (see below), whose sum is σ = 210624634368. Its totient is φ = 123514421760.

The previous prime is 164905989691. The next prime is 164905989701. The reversal of 164905989695 is 596989509461.

It is not a de Polignac number, because 164905989695 - 2² = 164905989691 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 (164905989691) 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, 5062484 + ... + 5094953.

It is an arithmetic number, because the mean of its divisors is an integer number (13164039648).

Almost surely, 2^164905989695 is an apocalyptic number.

164905989695 is a deficient number, since it is larger than the sum of its proper divisors (45718644673).

164905989695 is a wasteful number, since it uses less digits than its factorization.

164905989695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10157650.

The product of its (nonzero) digits is 188956800, while the sum is 71.

The spelling of 164905989695 in words is "one hundred sixty-four billion, nine hundred five million, nine hundred eighty-nine thousand, six hundred ninety-five".