163616559403 has 4 divisors (see below), whose sum is σ = 178490792088. Its totient is φ = 148742326720.

The previous prime is 163616559343. The next prime is 163616559439. The reversal of 163616559403 is 304955616361.

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 163616559403 - 2⁹ = 163616558891 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163616559443) 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, 7437116326 + ... + 7437116347.

It is an arithmetic number, because the mean of its divisors is an integer number (44622698022).

Almost surely, 2^163616559403 is an apocalyptic number.

163616559403 is a deficient number, since it is larger than the sum of its proper divisors (14874232685).

163616559403 is a wasteful number, since it uses less digits than its factorization.

163616559403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14874232684.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The spelling of 163616559403 in words is "one hundred sixty-three billion, six hundred sixteen million, five hundred fifty-nine thousand, four hundred three".