40171045049 has 2 divisors, whose sum is σ = 40171045050. Its totient is φ = 40171045048.

The previous prime is 40171045001. The next prime is 40171045121. The reversal of 40171045049 is 94054017104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39954013225 + 217031824 = 199885^2 + 14732^2 .

It is a cyclic number.

It is not a de Polignac number, because 40171045049 - 2²⁴ = 40154267833 is a prime.

It is a super-2 number, since 2×40171045049² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40171045249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20085522524 + 20085522525.

It is an arithmetic number, because the mean of its divisors is an integer number (20085522525).

Almost surely, 2^40171045049 is an apocalyptic number.

It is an amenable number.

40171045049 is a deficient number, since it is larger than the sum of its proper divisors (1).

40171045049 is an equidigital number, since it uses as much as digits as its factorization.

40171045049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 40171045049 in words is "forty billion, one hundred seventy-one million, forty-five thousand, forty-nine".