406819663689 has 4 divisors (see below), whose sum is σ = 542426218256. Its totient is φ = 271213109124.

The previous prime is 406819663681. The next prime is 406819663699. The reversal of 406819663689 is 986366918604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 406819663689 - 2³ = 406819663681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406819663681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67803277279 + ... + 67803277284.

It is an arithmetic number, because the mean of its divisors is an integer number (135606554564).

Almost surely, 2^406819663689 is an apocalyptic number.

It is an amenable number.

406819663689 is a deficient number, since it is larger than the sum of its proper divisors (135606554567).

406819663689 is a wasteful number, since it uses less digits than its factorization.

406819663689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135606554566.

The product of its (nonzero) digits is 80621568, while the sum is 66.

The spelling of 406819663689 in words is "four hundred six billion, eight hundred nineteen million, six hundred sixty-three thousand, six hundred eighty-nine".