1323783365681 has 8 divisors (see below), whose sum is σ = 1548078886464. Its totient is φ = 1108283747760.

The previous prime is 1323783365677. The next prime is 1323783365693. The reversal of 1323783365681 is 1865633873231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1323783365681 - 2² = 1323783365677 is a prime.

It is a super-2 number, since 2×1323783365681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323783365981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2198975390 + ... + 2198975991.

It is an arithmetic number, because the mean of its divisors is an integer number (193509860808).

Almost surely, 2^{1323783365681} is an apocalyptic number.

It is an amenable number.

1323783365681 is a deficient number, since it is larger than the sum of its proper divisors (224295520783).

1323783365681 is an equidigital number, since it uses as much as digits as its factorization.

1323783365681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397951431.

The product of its digits is 13063680, while the sum is 56.

The spelling of 1323783365681 in words is "one trillion, three hundred twenty-three billion, seven hundred eighty-three million, three hundred sixty-five thousand, six hundred eighty-one".