164697872 has 20 divisors (see below), whose sum is σ = 322264716. Its totient is φ = 81532800.

The previous prime is 164697817. The next prime is 164697889. The reversal of 164697872 is 278796461.

It can be written as a sum of positive squares in 2 ways, for example, as 141039376 + 23658496 = 11876^2 + 4864^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 164697872.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49343 + ... + 52574.

Almost surely, 2^164697872 is an apocalyptic number.

It is an amenable number.

164697872 is a deficient number, since it is larger than the sum of its proper divisors (157566844).

164697872 is a wasteful number, since it uses less digits than its factorization.

164697872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102026 (or 102020 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 164697872 is about 12833.4668737641. The cubic root of 164697872 is about 548.1456802737.

The spelling of 164697872 in words is "one hundred sixty-four million, six hundred ninety-seven thousand, eight hundred seventy-two".