40443621013 has 2 divisors, whose sum is σ = 40443621014. Its totient is φ = 40443621012.

The previous prime is 40443621007. The next prime is 40443621079. The reversal of 40443621013 is 31012634404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40440003409 + 3617604 = 201097^2 + 1902^2 .

It is a cyclic number.

It is not a de Polignac number, because 40443621013 - 2⁵ = 40443620981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40443621083) 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 as a sum of consecutive naturals, namely, 20221810506 + 20221810507.

It is an arithmetic number, because the mean of its divisors is an integer number (20221810507).

Almost surely, 2^40443621013 is an apocalyptic number.

It is an amenable number.

40443621013 is a deficient number, since it is larger than the sum of its proper divisors (1).

40443621013 is an equidigital number, since it uses as much as digits as its factorization.

40443621013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 40443621013 in words is "forty billion, four hundred forty-three million, six hundred twenty-one thousand, thirteen".