123344515404 has 72 divisors (see below), whose sum is σ = 340498987920. Its totient is φ = 37336780800.

The previous prime is 123344515397. The next prime is 123344515421. The reversal of 123344515404 is 404515443321.

123344515404 is a `hidden beast` number, since 1 + 23 + 3 + 44 + 51 + 540 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200244 + ... + 535524.

It is an arithmetic number, because the mean of its divisors is an integer number (4729152610).

Almost surely, 2^123344515404 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 123344515404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170249493960).

123344515404 is an abundant number, since it is smaller than the sum of its proper divisors (217154472516).

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

123344515404 is a wasteful number, since it uses less digits than its factorization.

123344515404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336231 (or 336226 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 123344515404 its reverse (404515443321), we get a palindrome (527859958725).

The spelling of 123344515404 in words is "one hundred twenty-three billion, three hundred forty-four million, five hundred fifteen thousand, four hundred four".