40505345614421 has 4 divisors (see below), whose sum is σ = 40514896513644. Its totient is φ = 40495794715200.

The previous prime is 40505345614417. The next prime is 40505345614427. The reversal of 40505345614421 is 12441654350504.

It is a happy number.

40505345614421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24040497478321 + 16464848136100 = 4903111^2 + 4057690^2 .

It is a cyclic number.

It is not a de Polignac number, because 40505345614421 - 2² = 40505345614417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505345614427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4775443250 + ... + 4775451731.

It is an arithmetic number, because the mean of its divisors is an integer number (10128724128411).

Almost surely, 2^{40505345614421} is an apocalyptic number.

It is an amenable number.

40505345614421 is a deficient number, since it is larger than the sum of its proper divisors (9550899223).

40505345614421 is an equidigital number, since it uses as much as digits as its factorization.

40505345614421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9550899222.

The product of its (nonzero) digits is 1152000, while the sum is 44.

Adding to 40505345614421 its reverse (12441654350504), we get a palindrome (52946999964925).

The spelling of 40505345614421 in words is "forty trillion, five hundred five billion, three hundred forty-five million, six hundred fourteen thousand, four hundred twenty-one".