164989956 has 48 divisors (see below), whose sum is σ = 397365696. Its totient is φ = 53241984.

The previous prime is 164989943. The next prime is 164989963. The reversal of 164989956 is 659989461.

It is a junction number, because it is equal to n+sod(n) for n = 164989896 and 164989905.

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 15 ways as a sum of consecutive naturals, for example, 99970 + ... + 101606.

It is an arithmetic number, because the mean of its divisors is an integer number (8278452).

Almost surely, 2^164989956 is an apocalyptic number.

It is an amenable number.

164989956 is an abundant number, since it is smaller than the sum of its proper divisors (232375740).

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

164989956 is a wasteful number, since it uses less digits than its factorization.

164989956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1906 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 57.

The square root of 164989956 is about 12844.8416105455. The cubic root of 164989956 is about 548.4695258463.

The spelling of 164989956 in words is "one hundred sixty-four million, nine hundred eighty-nine thousand, nine hundred fifty-six".