163091436 has 48 divisors (see below), whose sum is σ = 401017344. Its totient is φ = 51486336.

The previous prime is 163091419. The next prime is 163091437. The reversal of 163091436 is 634190361.

163091436 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 163091397 and 163091406.

It is not an unprimeable number, because it can be changed into a prime (163091437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25560 + ... + 31296.

It is an arithmetic number, because the mean of its divisors is an integer number (8354528).

Almost surely, 2^163091436 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 163091436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200508672).

163091436 is an abundant number, since it is smaller than the sum of its proper divisors (237925908).

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

163091436 is a wasteful number, since it uses less digits than its factorization.

163091436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5870 (or 5868 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 163091436 is about 12770.7257428856. The cubic root of 163091436 is about 546.3576800046.

The spelling of 163091436 in words is "one hundred sixty-three million, ninety-one thousand, four hundred thirty-six".