40320413321 has 4 divisors (see below), whose sum is σ = 40677231252. Its totient is φ = 39963595392.

The previous prime is 40320413303. The next prime is 40320413369. The reversal of 40320413321 is 12331402304.

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 17839609225 + 22480804096 = 133565^2 + 149936^2 .

It is a cyclic number.

It is not a de Polignac number, because 40320413321 - 2¹⁴ = 40320396937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40320413381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178408796 + ... + 178409021.

It is an arithmetic number, because the mean of its divisors is an integer number (10169307813).

Almost surely, 2^40320413321 is an apocalyptic number.

It is an amenable number.

40320413321 is a deficient number, since it is larger than the sum of its proper divisors (356817931).

40320413321 is a wasteful number, since it uses less digits than its factorization.

40320413321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356817930.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 40320413321 its reverse (12331402304), we get a palindrome (52651815625).

The spelling of 40320413321 in words is "forty billion, three hundred twenty million, four hundred thirteen thousand, three hundred twenty-one".