782040649409 has 2 divisors, whose sum is σ = 782040649410. Its totient is φ = 782040649408.

The previous prime is 782040649393. The next prime is 782040649447. The reversal of 782040649409 is 904946040287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 764842949809 + 17197699600 = 874553^2 + 131140^2 .

It is a cyclic number.

It is not a de Polignac number, because 782040649409 - 2⁴ = 782040649393 is a prime.

It is a super-2 number, since 2×782040649409² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (782040649309) 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, 391020324704 + 391020324705.

It is an arithmetic number, because the mean of its divisors is an integer number (391020324705).

Almost surely, 2^782040649409 is an apocalyptic number.

It is an amenable number.

782040649409 is a deficient number, since it is larger than the sum of its proper divisors (1).

782040649409 is an equidigital number, since it uses as much as digits as its factorization.

782040649409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 782040649409 in words is "seven hundred eighty-two billion, forty million, six hundred forty-nine thousand, four hundred nine".