1646040041 has 2 divisors, whose sum is σ = 1646040042. Its totient is φ = 1646040040.

The previous prime is 1646040023. The next prime is 1646040049. The reversal of 1646040041 is 1400406461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1618372441 + 27667600 = 40229^2 + 5260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1646040041 is a prime.

It is a super-3 number, since 3×1646040041³ (a number of 29 digits) contains 333 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 (1646040049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823020020 + 823020021.

It is an arithmetic number, because the mean of its divisors is an integer number (823020021).

Almost surely, 2^1646040041 is an apocalyptic number.

It is an amenable number.

1646040041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646040041 is an equidigital number, since it uses as much as digits as its factorization.

1646040041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1646040041 is about 40571.4190163470. The cubic root of 1646040041 is about 1180.7196703943.

The spelling of 1646040041 in words is "one billion, six hundred forty-six million, forty thousand, forty-one".