40320400321 has 4 divisors (see below), whose sum is σ = 40381585200. Its totient is φ = 40259215444.

The previous prime is 40320400319. The next prime is 40320400331. The reversal of 40320400321 is 12300402304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40320400321 - 2¹ = 40320400319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40320400331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30591451 + ... + 30592768.

It is an arithmetic number, because the mean of its divisors is an integer number (10095396300).

Almost surely, 2^40320400321 is an apocalyptic number.

It is an amenable number.

40320400321 is a deficient number, since it is larger than the sum of its proper divisors (61184879).

40320400321 is an equidigital number, since it uses as much as digits as its factorization.

40320400321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61184878.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 40320400321 its reverse (12300402304), we get a palindrome (52620802625).

The spelling of 40320400321 in words is "forty billion, three hundred twenty million, four hundred thousand, three hundred twenty-one".