163817836 has 48 divisors (see below), whose sum is σ = 354007360. Its totient is φ = 64592640.

The previous prime is 163817813. The next prime is 163817869. The reversal of 163817836 is 638718361.

163817836 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

Its product of digits (145152) is a multiple of the sum of its prime divisors (1512).

It is a junction number, because it is equal to n+sod(n) for n = 163817792 and 163817801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152710 + ... + 153778.

Almost surely, 2^163817836 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 163817836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177003680).

163817836 is an abundant number, since it is smaller than the sum of its proper divisors (190189524).

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

163817836 is a wasteful number, since it uses less digits than its factorization.

163817836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1512 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 163817836 is about 12799.1341894677. The cubic root of 163817836 is about 547.1676274053.

The spelling of 163817836 in words is "one hundred sixty-three million, eight hundred seventeen thousand, eight hundred thirty-six".