1323765555851 has 2 divisors, whose sum is σ = 1323765555852. Its totient is φ = 1323765555850.

The previous prime is 1323765555829. The next prime is 1323765555881. The reversal of 1323765555851 is 1585555673231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323765555851 - 2¹⁰ = 1323765554827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323765555881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661882777925 + 661882777926.

It is an arithmetic number, because the mean of its divisors is an integer number (661882777926).

Almost surely, 2^{1323765555851} is an apocalyptic number.

1323765555851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323765555851 is an equidigital number, since it uses as much as digits as its factorization.

1323765555851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900000, while the sum is 56.

The spelling of 1323765555851 in words is "one trillion, three hundred twenty-three billion, seven hundred sixty-five million, five hundred fifty-five thousand, eight hundred fifty-one".