123123511554404 has 24 divisors (see below), whose sum is σ = 219548209374648. Its totient is φ = 60395628084480.

The previous prime is 123123511554371. The next prime is 123123511554481. The reversal of 123123511554404 is 404455115321321.

It can be written as a sum of positive squares in 4 ways, for example, as 25222974973504 + 97900536580900 = 5022248^2 + 9894470^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19243787 + ... + 24830834.

It is an arithmetic number, because the mean of its divisors is an integer number (9147842057277).

Almost surely, 2^{123123511554404} is an apocalyptic number.

It is an amenable number.

123123511554404 is a deficient number, since it is larger than the sum of its proper divisors (96424697820244).

123123511554404 is a wasteful number, since it uses less digits than its factorization.

123123511554404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44087855 (or 44087853 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

Adding to 123123511554404 its reverse (404455115321321), we get a palindrome (527578626875725).

The spelling of 123123511554404 in words is "one hundred twenty-three trillion, one hundred twenty-three billion, five hundred eleven million, five hundred fifty-four thousand, four hundred four".