163241991816 has 32 divisors (see below), whose sum is σ = 408128414400. Its totient is φ = 54410872640.

The previous prime is 163241991811. The next prime is 163241991817. The reversal of 163241991816 is 618199142361.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (163241991811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252301 + ... + 624611.

It is an arithmetic number, because the mean of its divisors is an integer number (12754012950).

Almost surely, 2^163241991816 is an apocalyptic number.

It is an amenable number.

163241991816 is an abundant number, since it is smaller than the sum of its proper divisors (244886422584).

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

163241991816 is a wasteful number, since it uses less digits than its factorization.

163241991816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390589 (or 390585 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The spelling of 163241991816 in words is "one hundred sixty-three billion, two hundred forty-one million, nine hundred ninety-one thousand, eight hundred sixteen".