123316645622144 has 128 divisors (see below), whose sum is σ = 271760292669600. Its totient is φ = 55368509865984.

The previous prime is 123316645622143. The next prime is 123316645622147. The reversal of 123316645622144 is 441226546613321.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 123316645622092 and 123316645622101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123316645622143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404287739 + ... + 404592645.

Almost surely, 2^{123316645622144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123316645622144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135880146334800).

123316645622144 is an abundant number, since it is smaller than the sum of its proper divisors (148443647047456).

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

123316645622144 is a wasteful number, since it uses less digits than its factorization.

123316645622144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311540 (or 311528 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 50.

The spelling of 123316645622144 in words is "one hundred twenty-three trillion, three hundred sixteen billion, six hundred forty-five million, six hundred twenty-two thousand, one hundred forty-four".