163506544131504 has 40 divisors (see below), whose sum is σ = 482733606484480. Its totient is φ = 46716155466048.

The previous prime is 163506544131389. The next prime is 163506544131509. The reversal of 163506544131504 is 405131445605361.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (163506544131509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243313309384 + ... + 243313310055.

It is an arithmetic number, because the mean of its divisors is an integer number (12068340162112).

Almost surely, 2^{163506544131504} is an apocalyptic number.

163506544131504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

163506544131504 is an abundant number, since it is smaller than the sum of its proper divisors (319227062352976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163506544131504 is a wasteful number, since it uses less digits than its factorization.

163506544131504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486626619457 (or 486626619451 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 48.

Adding to 163506544131504 its reverse (405131445605361), we get a palindrome (568637989736865).

The spelling of 163506544131504 in words is "one hundred sixty-three trillion, five hundred six billion, five hundred forty-four million, one hundred thirty-one thousand, five hundred four".