163949568 has 88 divisors (see below), whose sum is σ = 442938048. Its totient is φ = 53907456.

The previous prime is 163949567. The next prime is 163949633. The reversal of 163949568 is 865949361.

It is a self number, because there is not a number n which added to its sum of digits gives 163949568.

It is not an unprimeable number, because it can be changed into a prime (163949567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254655 + ... + 255297.

Almost surely, 2^163949568 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 163949568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221469024).

163949568 is an abundant number, since it is smaller than the sum of its proper divisors (278988480).

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

163949568 is an equidigital number, since it uses as much as digits as its factorization.

163949568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 731 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The square root of 163949568 is about 12804.2792846767. The cubic root of 163949568 is about 547.3142540398.

The spelling of 163949568 in words is "one hundred sixty-three million, nine hundred forty-nine thousand, five hundred sixty-eight".