318440747507 has 4 divisors (see below), whose sum is σ = 318467061816. Its totient is φ = 318414433200.

The previous prime is 318440747501. The next prime is 318440747561. The reversal of 318440747507 is 705747044813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 705747044813 = 739 ⋅955002767.

It is a cyclic number.

It is not a de Polignac number, because 318440747507 - 2²⁰ = 318439698931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318440747501) 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, 13138994 + ... + 13163207.

It is an arithmetic number, because the mean of its divisors is an integer number (79616765454).

Almost surely, 2^318440747507 is an apocalyptic number.

318440747507 is a deficient number, since it is larger than the sum of its proper divisors (26314309).

318440747507 is a wasteful number, since it uses less digits than its factorization.

318440747507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26314308.

The product of its (nonzero) digits is 2634240, while the sum is 50.

The spelling of 318440747507 in words is "three hundred eighteen billion, four hundred forty million, seven hundred forty-seven thousand, five hundred seven".