164356556 has 72 divisors (see below), whose sum is σ = 364008960. Its totient is φ = 63550656.

The previous prime is 164356537. The next prime is 164356573. The reversal of 164356556 is 655653461.

It is a super-2 number, since 2×164356556² = 54026155000362272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222035 + ... + 222773.

It is an arithmetic number, because the mean of its divisors is an integer number (5055680).

Almost surely, 2^164356556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164356556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182004480).

164356556 is an abundant number, since it is smaller than the sum of its proper divisors (199652404).

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

164356556 is a wasteful number, since it uses less digits than its factorization.

164356556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 808 counting only the distinct ones).

The product of its digits is 324000, while the sum is 41.

The square root of 164356556 is about 12820.1620894589. The cubic root of 164356556 is about 547.7667636577.

The spelling of 164356556 in words is "one hundred sixty-four million, three hundred fifty-six thousand, five hundred fifty-six".