312243435620663 has 4 divisors (see below), whose sum is σ = 312561078994608. Its totient is φ = 311925792246720.

The previous prime is 312243435620639. The next prime is 312243435620693. The reversal of 312243435620663 is 366026534342213.

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

It is a cyclic number.

It is not a de Polignac number, because 312243435620663 - 2¹⁶ = 312243435555127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312243435620693) 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, 158821685498 + ... + 158821687463.

It is an arithmetic number, because the mean of its divisors is an integer number (78140269748652).

Almost surely, 2^{312243435620663} is an apocalyptic number.

312243435620663 is a deficient number, since it is larger than the sum of its proper divisors (317643373945).

312243435620663 is an equidigital number, since it uses as much as digits as its factorization.

312243435620663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317643373944.

The product of its (nonzero) digits is 11197440, while the sum is 50.

Adding to 312243435620663 its reverse (366026534342213), we get a palindrome (678269969962876).

The spelling of 312243435620663 in words is "three hundred twelve trillion, two hundred forty-three billion, four hundred thirty-five million, six hundred twenty thousand, six hundred sixty-three".