400520542422012 has 24 divisors (see below), whose sum is σ = 975180451115136. Its totient is φ = 127702201931568.

The previous prime is 400520542421971. The next prime is 400520542422041. The reversal of 400520542422012 is 210224245025004.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 725580692518 + ... + 725580693069.

It is an arithmetic number, because the mean of its divisors is an integer number (40632518796464).

Almost surely, 2^{400520542422012} is an apocalyptic number.

It is an amenable number.

400520542422012 is an abundant number, since it is smaller than the sum of its proper divisors (574659908693124).

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

400520542422012 is a wasteful number, since it uses less digits than its factorization.

400520542422012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451161385617 (or 1451161385615 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 33.

Adding to 400520542422012 its reverse (210224245025004), we get a palindrome (610744787447016).

The spelling of 400520542422012 in words is "four hundred trillion, five hundred twenty billion, five hundred forty-two million, four hundred twenty-two thousand, twelve".