1236468646321 has 4 divisors (see below), whose sum is σ = 1242875219812. Its totient is φ = 1230062072832.

The previous prime is 1236468646313. The next prime is 1236468646337.

1236468646321 is nontrivially palindromic in base 10.

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 914769822096 + 321698824225 = 956436^2 + 567185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1236468646321 - 2³ = 1236468646313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1236468643321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3203286456 + ... + 3203286841.

It is an arithmetic number, because the mean of its divisors is an integer number (310718804953).

Almost surely, 2^{1236468646321} is an apocalyptic number.

It is an amenable number.

1236468646321 is a deficient number, since it is larger than the sum of its proper divisors (6406573491).

1236468646321 is an equidigital number, since it uses as much as digits as its factorization.

1236468646321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406573490.

The product of its digits is 5971968, while the sum is 52.

The spelling of 1236468646321 in words is "one trillion, two hundred thirty-six billion, four hundred sixty-eight million, six hundred forty-six thousand, three hundred twenty-one".