163989504001 has 4 divisors (see below), whose sum is σ = 167478642432. Its totient is φ = 160500365572.

The previous prime is 163989503963. The next prime is 163989504017. The reversal of 163989504001 is 100405989361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163989504001 - 2¹⁷ = 163989372929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163989504401) 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, 1744569145 + ... + 1744569238.

It is an arithmetic number, because the mean of its divisors is an integer number (41869660608).

Almost surely, 2^163989504001 is an apocalyptic number.

It is an amenable number.

163989504001 is a deficient number, since it is larger than the sum of its proper divisors (3489138431).

163989504001 is an equidigital number, since it uses as much as digits as its factorization.

163989504001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489138430.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 163989504001 in words is "one hundred sixty-three billion, nine hundred eighty-nine million, five hundred four thousand, one".