323906909551 has 2 divisors, whose sum is σ = 323906909552. Its totient is φ = 323906909550.

The previous prime is 323906909549. The next prime is 323906909603. The reversal of 323906909551 is 155909609323.

It is an a-pointer prime, because the next prime (323906909603) can be obtained adding 323906909551 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 323906909551 - 2¹ = 323906909549 is a prime.

Together with 323906909549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323906909951) 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 as a sum of consecutive naturals, namely, 161953454775 + 161953454776.

It is an arithmetic number, because the mean of its divisors is an integer number (161953454776).

Almost surely, 2^323906909551 is an apocalyptic number.

323906909551 is a deficient number, since it is larger than the sum of its proper divisors (1).

323906909551 is an equidigital number, since it uses as much as digits as its factorization.

323906909551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1968300, while the sum is 52.

The spelling of 323906909551 in words is "three hundred twenty-three billion, nine hundred six million, nine hundred nine thousand, five hundred fifty-one".