123315254234550 has 144 divisors (see below), whose sum is σ = 379830992198112. Its totient is φ = 28097427686400.

The previous prime is 123315254234537. The next prime is 123315254234587. The reversal of 123315254234550 is 55432452513321.

123315254234550 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 1 + 5 + 25 + 42 + 34 + 550 = 666.

123315254234550 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123315254234496 and 123315254234505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 60748611 + ... + 62745710.

It is an arithmetic number, because the mean of its divisors is an integer number (2637715223598).

Almost surely, 2^{123315254234550} is an apocalyptic number.

123315254234550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123315254234550 is an abundant number, since it is smaller than the sum of its proper divisors (256515737963562).

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

123315254234550 is a wasteful number, since it uses less digits than its factorization.

123315254234550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123494663 (or 123494655 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

The spelling of 123315254234550 in words is "one hundred twenty-three trillion, three hundred fifteen billion, two hundred fifty-four million, two hundred thirty-four thousand, five hundred fifty".