312646444646213 has 4 divisors (see below), whose sum is σ = 312656000180160. Its totient is φ = 312636889112268.

The previous prime is 312646444646149. The next prime is 312646444646243.

312646444646213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312646444646213 - 2⁶ = 312646444646149 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 (312646444646243) 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, 4777717895 + ... + 4777783332.

It is an arithmetic number, because the mean of its divisors is an integer number (78164000045040).

Almost surely, 2^{312646444646213} is an apocalyptic number.

It is an amenable number.

312646444646213 is a deficient number, since it is larger than the sum of its proper divisors (9555533947).

312646444646213 is an equidigital number, since it uses as much as digits as its factorization.

312646444646213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9555533946.

The product of its digits is 47775744, while the sum is 56.

The spelling of 312646444646213 in words is "three hundred twelve trillion, six hundred forty-six billion, four hundred forty-four million, six hundred forty-six thousand, two hundred thirteen".