408880400689 has 2 divisors, whose sum is σ = 408880400690. Its totient is φ = 408880400688.

The previous prime is 408880400683. The next prime is 408880400807. The reversal of 408880400689 is 986004088804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389865369664 + 19015031025 = 624392^2 + 137895^2 .

It is a cyclic number.

It is not a de Polignac number, because 408880400689 - 2⁷ = 408880400561 is a prime.

It is not a weakly prime, because it can be changed into another prime (408880400683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204440200344 + 204440200345.

It is an arithmetic number, because the mean of its divisors is an integer number (204440200345).

Almost surely, 2^408880400689 is an apocalyptic number.

It is an amenable number.

408880400689 is a deficient number, since it is larger than the sum of its proper divisors (1).

408880400689 is an equidigital number, since it uses as much as digits as its factorization.

408880400689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3538944, while the sum is 55.

The spelling of 408880400689 in words is "four hundred eight billion, eight hundred eighty million, four hundred thousand, six hundred eighty-nine".