318688520363 has 4 divisors (see below), whose sum is σ = 318815845488. Its totient is φ = 318561195240.

The previous prime is 318688520347. The next prime is 318688520369. The reversal of 318688520363 is 363025886813.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 318688520363 - 2⁴ = 318688520347 is a prime.

It is a super-3 number, since 3×318688520363³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318688520369) 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, 63658808 + ... + 63663813.

It is an arithmetic number, because the mean of its divisors is an integer number (79703961372).

Almost surely, 2^318688520363 is an apocalyptic number.

318688520363 is a deficient number, since it is larger than the sum of its proper divisors (127325125).

318688520363 is a wasteful number, since it uses less digits than its factorization.

318688520363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127325124.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 318688520363 in words is "three hundred eighteen billion, six hundred eighty-eight million, five hundred twenty thousand, three hundred sixty-three".