123543521154145 has 64 divisors (see below), whose sum is σ = 151802747191296. Its totient is φ = 96506002575360.

The previous prime is 123543521154143. The next prime is 123543521154187. The reversal of 123543521154145 is 541451125345321.

It is not a de Polignac number, because 123543521154145 - 2¹ = 123543521154143 is a prime.

It is a super-2 number, since 2×123543521154145² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123543521154095 and 123543521154104.

It is not an unprimeable number, because it can be changed into a prime (123543521154143) 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 63 ways as a sum of consecutive naturals, for example, 10320228010 + ... + 10320239980.

It is an arithmetic number, because the mean of its divisors is an integer number (2371917924864).

Almost surely, 2^{123543521154145} is an apocalyptic number.

It is an amenable number.

123543521154145 is a deficient number, since it is larger than the sum of its proper divisors (28259226037151).

123543521154145 is a wasteful number, since it uses less digits than its factorization.

123543521154145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13190.

The product of its digits is 1440000, while the sum is 46.

Adding to 123543521154145 its reverse (541451125345321), we get a palindrome (664994646499466).

The spelling of 123543521154145 in words is "one hundred twenty-three trillion, five hundred forty-three billion, five hundred twenty-one million, one hundred fifty-four thousand, one hundred forty-five".