409498564789 has 2 divisors, whose sum is σ = 409498564790. Its totient is φ = 409498564788.

The previous prime is 409498564781. The next prime is 409498564801. The reversal of 409498564789 is 987465894904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401315915025 + 8182649764 = 633495^2 + 90458^2 .

It is a cyclic number.

It is not a de Polignac number, because 409498564789 - 2³ = 409498564781 is a prime.

It is a super-2 number, since 2×409498564789² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409498564781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204749282394 + 204749282395.

It is an arithmetic number, because the mean of its divisors is an integer number (204749282395).

Almost surely, 2^409498564789 is an apocalyptic number.

It is an amenable number.

409498564789 is a deficient number, since it is larger than the sum of its proper divisors (1).

409498564789 is an equidigital number, since it uses as much as digits as its factorization.

409498564789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 627056640, while the sum is 73.

The spelling of 409498564789 in words is "four hundred nine billion, four hundred ninety-eight million, five hundred sixty-four thousand, seven hundred eighty-nine".