163520534543 has 16 divisors (see below), whose sum is σ = 169686835200. Its totient is φ = 157411410240.

The previous prime is 163520534501. The next prime is 163520534587. The reversal of 163520534543 is 345435025361.

It is a cyclic number.

It is not a de Polignac number, because 163520534543 - 2¹² = 163520530447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163520534543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163520554543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7049198 + ... + 7072356.

It is an arithmetic number, because the mean of its divisors is an integer number (10605427200).

Almost surely, 2^163520534543 is an apocalyptic number.

163520534543 is a deficient number, since it is larger than the sum of its proper divisors (6166300657).

163520534543 is a wasteful number, since it uses less digits than its factorization.

163520534543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24382.

The product of its (nonzero) digits is 648000, while the sum is 41.

The spelling of 163520534543 in words is "one hundred sixty-three billion, five hundred twenty million, five hundred thirty-four thousand, five hundred forty-three".