40424561321 has 2 divisors, whose sum is σ = 40424561322. Its totient is φ = 40424561320.

The previous prime is 40424561267. The next prime is 40424561323. The reversal of 40424561321 is 12316542404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38577280921 + 1847280400 = 196411^2 + 42980^2 .

It is a cyclic number.

It is not a de Polignac number, because 40424561321 - 2⁶ = 40424561257 is a prime.

Together with 40424561323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40424561323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20212280660 + 20212280661.

It is an arithmetic number, because the mean of its divisors is an integer number (20212280661).

Almost surely, 2^40424561321 is an apocalyptic number.

It is an amenable number.

40424561321 is a deficient number, since it is larger than the sum of its proper divisors (1).

40424561321 is an equidigital number, since it uses as much as digits as its factorization.

40424561321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 40424561321 in words is "forty billion, four hundred twenty-four million, five hundred sixty-one thousand, three hundred twenty-one".