164914773409 has 9 divisors (see below), whose sum is σ = 167781690993. Its totient is φ = 162096054132.

The previous prime is 164914773407. The next prime is 164914773469. The reversal of 164914773409 is 904377419461.

The square root of 164914773409 is 406097.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 164914773409 - 2¹ = 164914773407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164914773409.

It is not an unprimeable number, because it can be changed into a prime (164914773407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23956282 + ... + 23963164.

Almost surely, 2^164914773409 is an apocalyptic number.

164914773409 is the 406097-th square number.

164914773409 is the 203049-th centered octagonal number.

It is an amenable number.

164914773409 is a deficient number, since it is larger than the sum of its proper divisors (2866917584).

164914773409 is an frugal number, since it uses more digits than its factorization.

164914773409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13884 (or 6942 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 164914773409 in words is "one hundred sixty-four billion, nine hundred fourteen million, seven hundred seventy-three thousand, four hundred nine".