318718672557 has 4 divisors (see below), whose sum is σ = 424958230080. Its totient is φ = 212479115036.

The previous prime is 318718672543. The next prime is 318718672627. The reversal of 318718672557 is 755276817813.

It is a happy number.

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 318718672557 - 2⁸ = 318718672301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318718672557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318718672507) 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, 53119778757 + ... + 53119778762.

It is an arithmetic number, because the mean of its divisors is an integer number (106239557520).

Almost surely, 2^318718672557 is an apocalyptic number.

It is an amenable number.

318718672557 is a deficient number, since it is larger than the sum of its proper divisors (106239557523).

318718672557 is a wasteful number, since it uses less digits than its factorization.

318718672557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106239557522.

The product of its digits is 19756800, while the sum is 60.

The spelling of 318718672557 in words is "three hundred eighteen billion, seven hundred eighteen million, six hundred seventy-two thousand, five hundred fifty-seven".