163956500 has 48 divisors (see below), whose sum is σ = 379164240. Its totient is φ = 61721600.

The previous prime is 163956493. The next prime is 163956503. The reversal of 163956500 is 5659361.

It can be written as a sum of positive squares in 8 ways, for example, as 20052484 + 143904016 = 4478^2 + 11996^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163956503) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1145 + ... + 18144.

It is an arithmetic number, because the mean of its divisors is an integer number (7899255).

Almost surely, 2^163956500 is an apocalyptic number.

163956500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163956500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189582120).

163956500 is an abundant number, since it is smaller than the sum of its proper divisors (215207740).

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

163956500 is a wasteful number, since it uses less digits than its factorization.

163956500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19325 (or 19313 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 163956500 is about 12804.5499725683. The cubic root of 163956500 is about 547.3219676496.

The spelling of 163956500 in words is "one hundred sixty-three million, nine hundred fifty-six thousand, five hundred".