40320402305 has 4 divisors (see below), whose sum is σ = 48384482772. Its totient is φ = 32256321840.

The previous prime is 40320402301. The next prime is 40320402349. The reversal of 40320402305 is 50320402304.

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 11999887936 + 28320514369 = 109544^2 + 168287^2 .

It is not a de Polignac number, because 40320402305 - 2² = 40320402301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40320402301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4032040226 + ... + 4032040235.

It is an arithmetic number, because the mean of its divisors is an integer number (12096120693).

Almost surely, 2^40320402305 is an apocalyptic number.

It is an amenable number.

40320402305 is a deficient number, since it is larger than the sum of its proper divisors (8064080467).

40320402305 is an equidigital number, since it uses as much as digits as its factorization.

40320402305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8064080466.

The product of its (nonzero) digits is 2880, while the sum is 23.

Adding to 40320402305 its reverse (50320402304), we get a palindrome (90640804609).

Subtracting 40320402305 from its reverse (50320402304), we obtain a palindrome (9999999999).

The spelling of 40320402305 in words is "forty billion, three hundred twenty million, four hundred two thousand, three hundred five".