163961958573 has 96 divisors (see below), whose sum is σ = 290234880000. Its totient is φ = 87108587136.

The previous prime is 163961958553. The next prime is 163961958583. The reversal of 163961958573 is 375859169361.

163961958573 is a `hidden beast` number, since 1 + 6 + 3 + 9 + 6 + 1 + 9 + 58 + 573 = 666.

163961958573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163961958573 - 2¹² = 163961954477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 163961958573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163961958553) 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 95 ways as a sum of consecutive naturals, for example, 50776323 + ... + 50779551.

It is an arithmetic number, because the mean of its divisors is an integer number (3023280000).

Almost surely, 2^163961958573 is an apocalyptic number.

It is an amenable number.

163961958573 is a deficient number, since it is larger than the sum of its proper divisors (126272921427).

163961958573 is a wasteful number, since it uses less digits than its factorization.

163961958573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039 (or 4036 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 63.

The spelling of 163961958573 in words is "one hundred sixty-three billion, nine hundred sixty-one million, nine hundred fifty-eight thousand, five hundred seventy-three".