40405075105 has 4 divisors (see below), whose sum is σ = 48486090132. Its totient is φ = 32324060080.

The previous prime is 40405075099. The next prime is 40405075121. The reversal of 40405075105 is 50157050404.

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 22894110864 + 17510964241 = 151308^2 + 132329^2 .

It is not a de Polignac number, because 40405075105 - 2⁷ = 40405074977 is a prime.

It is a super-2 number, since 2×40405075105² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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, 4040507506 + ... + 4040507515.

It is an arithmetic number, because the mean of its divisors is an integer number (12121522533).

Almost surely, 2^40405075105 is an apocalyptic number.

It is an amenable number.

40405075105 is a deficient number, since it is larger than the sum of its proper divisors (8081015027).

40405075105 is an equidigital number, since it uses as much as digits as its factorization.

40405075105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081015026.

The product of its (nonzero) digits is 14000, while the sum is 31.

The spelling of 40405075105 in words is "forty billion, four hundred five million, seventy-five thousand, one hundred five".