10320861783209 has 4 divisors (see below), whose sum is σ = 10599803993604. Its totient is φ = 10041919572816.

The previous prime is 10320861783181. The next prime is 10320861783251. The reversal of 10320861783209 is 90238716802301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9840235717225 + 480626065984 = 3136915^2 + 693272^2 .

It is a cyclic number.

It is not a de Polignac number, because 10320861783209 - 2⁸ = 10320861782953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10320861783109) 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 in 3 ways as a sum of consecutive naturals, for example, 139471105142 + ... + 139471105215.

It is an arithmetic number, because the mean of its divisors is an integer number (2649950998401).

Almost surely, 2^{10320861783209} is an apocalyptic number.

It is an amenable number.

10320861783209 is a deficient number, since it is larger than the sum of its proper divisors (278942210395).

10320861783209 is an equidigital number, since it uses as much as digits as its factorization.

10320861783209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278942210394.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 10320861783209 in words is "ten trillion, three hundred twenty billion, eight hundred sixty-one million, seven hundred eighty-three thousand, two hundred nine".