163606642662403 has 4 divisors (see below), whose sum is σ = 163607342826600. Its totient is φ = 163605942498208.

The previous prime is 163606642662391. The next prime is 163606642662511. The reversal of 163606642662403 is 304266246606361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163606642662403 - 2²⁵ = 163606609107971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163606642612403) 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, 349731478 + ... + 350198971.

It is an arithmetic number, because the mean of its divisors is an integer number (40901835706650).

Almost surely, 2^{163606642662403} is an apocalyptic number.

163606642662403 is a deficient number, since it is larger than the sum of its proper divisors (700164197).

163606642662403 is an equidigital number, since it uses as much as digits as its factorization.

163606642662403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700164196.

The product of its (nonzero) digits is 26873856, while the sum is 55.

The spelling of 163606642662403 in words is "one hundred sixty-three trillion, six hundred six billion, six hundred forty-two million, six hundred sixty-two thousand, four hundred three".