163991488 has 28 divisors (see below), whose sum is σ = 335922112. Its totient is φ = 79349760.

The previous prime is 163991467. The next prime is 163991497. The reversal of 163991488 is 884199361.

163991488 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 39345 + ... + 43312.

Almost surely, 2^163991488 is an apocalyptic number.

It is an amenable number.

163991488 is an abundant number, since it is smaller than the sum of its proper divisors (171930624).

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

163991488 is an equidigital number, since it uses as much as digits as its factorization.

163991488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82700 (or 82690 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 163991488 is about 12805.9161327880. The cubic root of 163991488 is about 547.3608973636.

The spelling of 163991488 in words is "one hundred sixty-three million, nine hundred ninety-one thousand, four hundred eighty-eight".