163400324021 has 6 divisors (see below), whose sum is σ = 179605314966. Its totient is φ = 148545749000.

The previous prime is 163400323997. The next prime is 163400324041. The reversal of 163400324021 is 120423004361.

163400324021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 125808543025 + 37591780996 = 354695^2 + 193886^2 .

It is a de Polignac number, because none of the positive numbers 2^k-163400324021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163400324041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 675207830 + ... + 675208071.

It is an arithmetic number, because the mean of its divisors is an integer number (29934219161).

Almost surely, 2^163400324021 is an apocalyptic number.

163400324021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163400324021 is a deficient number, since it is larger than the sum of its proper divisors (16204990945).

163400324021 is a wasteful number, since it uses less digits than its factorization.

163400324021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350415923 (or 1350415912 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 163400324021 its reverse (120423004361), we get a palindrome (283823328382).

The spelling of 163400324021 in words is "one hundred sixty-three billion, four hundred million, three hundred twenty-four thousand, twenty-one".