163643253646603 has 4 divisors (see below), whose sum is σ = 164251592879760. Its totient is φ = 163034914413448.

The previous prime is 163643253646573. The next prime is 163643253646627. The reversal of 163643253646603 is 306646352346361.

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 163643253646603 - 2¹³ = 163643253638411 is a prime.

It is a super-2 number, since 2×163643253646603² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163643253646673) 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 3 ways as a sum of consecutive naturals, for example, 304169616175 + ... + 304169616712.

It is an arithmetic number, because the mean of its divisors is an integer number (41062898219940).

Almost surely, 2^{163643253646603} is an apocalyptic number.

163643253646603 is a deficient number, since it is larger than the sum of its proper divisors (608339233157).

163643253646603 is an equidigital number, since it uses as much as digits as its factorization.

163643253646603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608339233156.

The product of its (nonzero) digits is 100776960, while the sum is 58.

The spelling of 163643253646603 in words is "one hundred sixty-three trillion, six hundred forty-three billion, two hundred fifty-three million, six hundred forty-six thousand, six hundred three".