318650808613 has 4 divisors (see below), whose sum is σ = 321744505888. Its totient is φ = 315557111340.

The previous prime is 318650808611. The next prime is 318650808643. The reversal of 318650808613 is 316808056813.

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: 316808056813 = 1061 ⋅298593833.

It is a cyclic number.

It is not a de Polignac number, because 318650808613 - 2¹ = 318650808611 is a prime.

It is a super-3 number, since 3×318650808613³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318650808611) 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, 1546848483 + ... + 1546848688.

It is an arithmetic number, because the mean of its divisors is an integer number (80436126472).

Almost surely, 2^318650808613 is an apocalyptic number.

It is an amenable number.

318650808613 is a deficient number, since it is larger than the sum of its proper divisors (3093697275).

318650808613 is a wasteful number, since it uses less digits than its factorization.

318650808613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093697274.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 318650808613 in words is "three hundred eighteen billion, six hundred fifty million, eight hundred eight thousand, six hundred thirteen".