163440162443506 has 8 divisors (see below), whose sum is σ = 264018723947244. Its totient is φ = 75433921127760.

The previous prime is 163440162443501. The next prime is 163440162443563. The reversal of 163440162443506 is 605344261044361.

It can be written as a sum of positive squares in 2 ways, for example, as 159975318978225 + 3464843465281 = 12648135^2 + 1861409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 163440162443506.

It is not an unprimeable number, because it can be changed into a prime (163440162443501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3143080046965 + ... + 3143080047016.

Almost surely, 2^{163440162443506} is an apocalyptic number.

163440162443506 is a deficient number, since it is larger than the sum of its proper divisors (100578561503738).

163440162443506 is a wasteful number, since it uses less digits than its factorization.

163440162443506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286160093996.

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 163440162443506 in words is "one hundred sixty-three trillion, four hundred forty billion, one hundred sixty-two million, four hundred forty-three thousand, five hundred six".