123243513545125 has 16 divisors (see below), whose sum is σ = 153851268272832. Its totient is φ = 98567013805200.

The previous prime is 123243513545107. The next prime is 123243513545143. The reversal of 123243513545125 is 521545315342321.

It is an interprime number because it is at equal distance from previous prime (123243513545107) and next prime (123243513545143).

It is not a de Polignac number, because 123243513545125 - 2²³ = 123243505156517 is a prime.

It is a super-2 number, since 2×123243513545125² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138540007 + ... + 139426756.

It is an arithmetic number, because the mean of its divisors is an integer number (9615704267052).

Almost surely, 2^{123243513545125} is an apocalyptic number.

It is an amenable number.

123243513545125 is a deficient number, since it is larger than the sum of its proper divisors (30607754727707).

123243513545125 is an equidigital number, since it uses as much as digits as its factorization.

123243513545125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277970325 (or 277970315 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 46.

Adding to 123243513545125 its reverse (521545315342321), we get a palindrome (644788828887446).

The spelling of 123243513545125 in words is "one hundred twenty-three trillion, two hundred forty-three billion, five hundred thirteen million, five hundred forty-five thousand, one hundred twenty-five".