123520543105 has 8 divisors (see below), whose sum is σ = 151021343592. Its totient is φ = 96951973248.

The previous prime is 123520543043. The next prime is 123520543121. The reversal of 123520543105 is 501345025321.

It can be written as a sum of positive squares in 4 ways, for example, as 26918308624 + 96602234481 = 164068^2 + 310809^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123520543105 - 2²⁹ = 122983672193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233057364 + ... + 233057893.

It is an arithmetic number, because the mean of its divisors is an integer number (18877667949).

Almost surely, 2^123520543105 is an apocalyptic number.

It is an amenable number.

123520543105 is a deficient number, since it is larger than the sum of its proper divisors (27500800487).

123520543105 is an equidigital number, since it uses as much as digits as its factorization.

123520543105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466115315.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 123520543105 its reverse (501345025321), we get a palindrome (624865568426).

The spelling of 123520543105 in words is "one hundred twenty-three billion, five hundred twenty million, five hundred forty-three thousand, one hundred five".