123132854718505 has 4 divisors (see below), whose sum is σ = 147759425662212. Its totient is φ = 98506283774800.

The previous prime is 123132854718491. The next prime is 123132854718529. The reversal of 123132854718505 is 505817458231321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18716767858944 + 104416086859561 = 4326288^2 + 10218419^2 .

It is not a de Polignac number, because 123132854718505 - 2¹¹ = 123132854716457 is a prime.

It is a super-2 number, since 2×123132854718505² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12313285471846 + ... + 12313285471855.

It is an arithmetic number, because the mean of its divisors is an integer number (36939856415553).

Almost surely, 2^{123132854718505} is an apocalyptic number.

It is an amenable number.

123132854718505 is a deficient number, since it is larger than the sum of its proper divisors (24626570943707).

123132854718505 is an equidigital number, since it uses as much as digits as its factorization.

123132854718505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24626570943706.

The product of its (nonzero) digits is 8064000, while the sum is 55.

The spelling of 123132854718505 in words is "one hundred twenty-three trillion, one hundred thirty-two billion, eight hundred fifty-four million, seven hundred eighteen thousand, five hundred five".