40105464209 has 2 divisors, whose sum is σ = 40105464210. Its totient is φ = 40105464208.

The previous prime is 40105464193. The next prime is 40105464241. The reversal of 40105464209 is 90246450104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39616921600 + 488542609 = 199040^2 + 22103^2 .

It is a cyclic number.

It is not a de Polignac number, because 40105464209 - 2⁴ = 40105464193 is a prime.

It is not a weakly prime, because it can be changed into another prime (40107464209) 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, 20052732104 + 20052732105.

It is an arithmetic number, because the mean of its divisors is an integer number (20052732105).

Almost surely, 2^40105464209 is an apocalyptic number.

It is an amenable number.

40105464209 is a deficient number, since it is larger than the sum of its proper divisors (1).

40105464209 is an equidigital number, since it uses as much as digits as its factorization.

40105464209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 40105464209 in words is "forty billion, one hundred five million, four hundred sixty-four thousand, two hundred nine".