400123123211044 has 48 divisors (see below), whose sum is σ = 747999115033968. Its totient is φ = 186618588520448.

The previous prime is 400123123211039. The next prime is 400123123211089. The reversal of 400123123211044 is 440112321321004.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 117303629262400 + 282819493948644 = 10830680^2 + 16817238^2 .

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 15 ways as a sum of consecutive naturals, for example, 172606914 + ... + 174909670.

It is an arithmetic number, because the mean of its divisors is an integer number (15583314896541).

Almost surely, 2^{400123123211044} is an apocalyptic number.

It is an amenable number.

400123123211044 is a deficient number, since it is larger than the sum of its proper divisors (347875991822924).

400123123211044 is a wasteful number, since it uses less digits than its factorization.

400123123211044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325504 (or 2325502 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 400123123211044 its reverse (440112321321004), we get a palindrome (840235444532048).

The spelling of 400123123211044 in words is "four hundred trillion, one hundred twenty-three billion, one hundred twenty-three million, two hundred eleven thousand, forty-four".