312640324313 has 4 divisors (see below), whose sum is σ = 312812960208. Its totient is φ = 312467688420.

The previous prime is 312640324303. The next prime is 312640324327. The reversal of 312640324313 is 313423046213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 313423046213 = 491 ⋅638336143.

It is a cyclic number.

It is not a de Polignac number, because 312640324313 - 2¹⁸ = 312640062169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312640324313.

It is not an unprimeable number, because it can be changed into a prime (312640324303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86315231 + ... + 86318852.

It is an arithmetic number, because the mean of its divisors is an integer number (78203240052).

Almost surely, 2^312640324313 is an apocalyptic number.

It is an amenable number.

312640324313 is a deficient number, since it is larger than the sum of its proper divisors (172635895).

312640324313 is a wasteful number, since it uses less digits than its factorization.

312640324313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172635894.

The product of its (nonzero) digits is 31104, while the sum is 32.

The spelling of 312640324313 in words is "three hundred twelve billion, six hundred forty million, three hundred twenty-four thousand, three hundred thirteen".