408704909761 has 2 divisors, whose sum is σ = 408704909762. Its totient is φ = 408704909760.

The previous prime is 408704909759. The next prime is 408704909831. The reversal of 408704909761 is 167909407804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274320347536 + 134384562225 = 523756^2 + 366585^2 .

It is a cyclic number.

It is not a de Polignac number, because 408704909761 - 2¹ = 408704909759 is a prime.

Together with 408704909759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (408704909731) 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, 204352454880 + 204352454881.

It is an arithmetic number, because the mean of its divisors is an integer number (204352454881).

Almost surely, 2^408704909761 is an apocalyptic number.

It is an amenable number.

408704909761 is a deficient number, since it is larger than the sum of its proper divisors (1).

408704909761 is an equidigital number, since it uses as much as digits as its factorization.

408704909761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 408704909761 in words is "four hundred eight billion, seven hundred four million, nine hundred nine thousand, seven hundred sixty-one".