163616436 has 30 divisors (see below), whose sum is σ = 427726530. Its totient is φ = 54538704.

The previous prime is 163616423. The next prime is 163616441. The reversal of 163616436 is 634616361.

163616436 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 1 + 643 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 92044836 + 71571600 = 9594^2 + 8460^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 163616436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 252171 + ... + 252818.

It is an arithmetic number, because the mean of its divisors is an integer number (14257551).

Almost surely, 2^163616436 is an apocalyptic number.

It is an amenable number.

163616436 is an abundant number, since it is smaller than the sum of its proper divisors (264110094).

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

163616436 is a wasteful number, since it uses less digits than its factorization.

163616436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505005 (or 504994 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 163616436 is about 12791.2640501242. The cubic root of 163616436 is about 546.9433035383.

The spelling of 163616436 in words is "one hundred sixty-three million, six hundred sixteen thousand, four hundred thirty-six".