164717772 has 12 divisors (see below), whose sum is σ = 384341496. Its totient is φ = 54905920.

The previous prime is 164717753. The next prime is 164717801. The reversal of 164717772 is 277717461.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6863229 + ... + 6863252.

It is an arithmetic number, because the mean of its divisors is an integer number (32028458).

Almost surely, 2^164717772 is an apocalyptic number.

164717772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

164717772 is an abundant number, since it is smaller than the sum of its proper divisors (219623724).

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

164717772 is a wasteful number, since it uses less digits than its factorization.

164717772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13726488 (or 13726486 counting only the distinct ones).

The product of its digits is 115248, while the sum is 42.

The square root of 164717772 is about 12834.2421669532. The cubic root of 164717772 is about 548.1677563730.

The spelling of 164717772 in words is "one hundred sixty-four million, seven hundred seventeen thousand, seven hundred seventy-two".