404664444851 has 2 divisors, whose sum is σ = 404664444852. Its totient is φ = 404664444850.

The previous prime is 404664444827. The next prime is 404664444853. The reversal of 404664444851 is 158444466404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404664444851 is a prime.

It is a Sophie Germain prime.

Together with 404664444853, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404664444851.

It is not a weakly prime, because it can be changed into another prime (404664444853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202332222425 + 202332222426.

It is an arithmetic number, because the mean of its divisors is an integer number (202332222426).

Almost surely, 2^404664444851 is an apocalyptic number.

404664444851 is a deficient number, since it is larger than the sum of its proper divisors (1).

404664444851 is an equidigital number, since it uses as much as digits as its factorization.

404664444851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5898240, while the sum is 50.

The spelling of 404664444851 in words is "four hundred four billion, six hundred sixty-four million, four hundred forty-four thousand, eight hundred fifty-one".