163003960821 has 32 divisors (see below), whose sum is σ = 237969664128. Its totient is φ = 98646958080.

The previous prime is 163003960817. The next prime is 163003960837. The reversal of 163003960821 is 128069300361.

It is not a de Polignac number, because 163003960821 - 2² = 163003960817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 163003960821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163003960891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429141 + ... + 714261.

It is an arithmetic number, because the mean of its divisors is an integer number (7436552004).

Almost surely, 2^163003960821 is an apocalyptic number.

It is an amenable number.

163003960821 is a deficient number, since it is larger than the sum of its proper divisors (74965703307).

163003960821 is a wasteful number, since it uses less digits than its factorization.

163003960821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285381.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 163003960821 in words is "one hundred sixty-three billion, three million, nine hundred sixty thousand, eight hundred twenty-one".