401323144544 has 72 divisors (see below), whose sum is σ = 919334093328. Its totient is φ = 171952139520.

The previous prime is 401323144531. The next prime is 401323144553. The reversal of 401323144544 is 445441323104.

It is a happy number.

It is a super-2 number, since 2×401323144544² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6603962 + ... + 6664454.

It is an arithmetic number, because the mean of its divisors is an integer number (12768529074).

Almost surely, 2^401323144544 is an apocalyptic number.

It is an amenable number.

401323144544 is an abundant number, since it is smaller than the sum of its proper divisors (518010948784).

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

401323144544 is a wasteful number, since it uses less digits than its factorization.

401323144544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64748 (or 64733 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 401323144544 its reverse (445441323104), we get a palindrome (846764467648).

The spelling of 401323144544 in words is "four hundred one billion, three hundred twenty-three million, one hundred forty-four thousand, five hundred forty-four".