1640410459 has 2 divisors, whose sum is σ = 1640410460. Its totient is φ = 1640410458.

The previous prime is 1640410411. The next prime is 1640410487. The reversal of 1640410459 is 9540140461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1640410459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1640410159) 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, 820205229 + 820205230.

It is an arithmetic number, because the mean of its divisors is an integer number (820205230).

Almost surely, 2^1640410459 is an apocalyptic number.

1640410459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640410459 is an equidigital number, since it uses as much as digits as its factorization.

1640410459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1640410459 is about 40501.9809268633. The cubic root of 1640410459 is about 1179.3720826141.

The spelling of 1640410459 in words is "one billion, six hundred forty million, four hundred ten thousand, four hundred fifty-nine".