123155225412540 has 48 divisors (see below), whose sum is σ = 346567468531200. Its totient is φ = 32676361312320.

The previous prime is 123155225412529. The next prime is 123155225412559. The reversal of 123155225412540 is 45214522551321.

It is a super-3 number, since 3×123155225412540³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123155225412492 and 123155225412501.

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, 5157242056 + ... + 5157265935.

It is an arithmetic number, because the mean of its divisors is an integer number (7220155594400).

Almost surely, 2^{123155225412540} is an apocalyptic number.

123155225412540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123155225412540 is an abundant number, since it is smaller than the sum of its proper divisors (223412243118660).

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

123155225412540 is a wasteful number, since it uses less digits than its factorization.

123155225412540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10314508202 (or 10314508200 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 42.

Adding to 123155225412540 its reverse (45214522551321), we get a palindrome (168369747963861).

The spelling of 123155225412540 in words is "one hundred twenty-three trillion, one hundred fifty-five billion, two hundred twenty-five million, four hundred twelve thousand, five hundred forty".