123455424144 has 160 divisors (see below), whose sum is σ = 356717168640. Its totient is φ = 36547416576.

The previous prime is 123455424143. The next prime is 123455424173. The reversal of 123455424144 is 441424554321.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (123455424143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1694679 + ... + 1766025.

It is an arithmetic number, because the mean of its divisors is an integer number (2229482304).

Almost surely, 2^123455424144 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 123455424144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178358584320).

123455424144 is an abundant number, since it is smaller than the sum of its proper divisors (233261744496).

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

123455424144 is a wasteful number, since it uses less digits than its factorization.

123455424144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71477 (or 71471 counting only the distinct ones).

The product of its digits is 307200, while the sum is 39.

Adding to 123455424144 its reverse (441424554321), we get a palindrome (564879978465).

The spelling of 123455424144 in words is "one hundred twenty-three billion, four hundred fifty-five million, four hundred twenty-four thousand, one hundred forty-four".