40320424321 has 4 divisors (see below), whose sum is σ = 42073486272. Its totient is φ = 38567362372.

The previous prime is 40320424307. The next prime is 40320424349. The reversal of 40320424321 is 12342402304.

It is a happy number.

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 40320424321 - 2¹⁷ = 40320293249 is a prime.

It is a super-2 number, since 2×40320424321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40320424301) 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, 876530941 + ... + 876530986.

It is an arithmetic number, because the mean of its divisors is an integer number (10518371568).

Almost surely, 2^40320424321 is an apocalyptic number.

It is an amenable number.

40320424321 is a deficient number, since it is larger than the sum of its proper divisors (1753061951).

40320424321 is a wasteful number, since it uses less digits than its factorization.

40320424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753061950.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 40320424321 its reverse (12342402304), we get a palindrome (52662826625).

The spelling of 40320424321 in words is "forty billion, three hundred twenty million, four hundred twenty-four thousand, three hundred twenty-one".