318648363681 has 32 divisors (see below), whose sum is σ = 458445028608. Its totient is φ = 196120770560.

The previous prime is 318648363653. The next prime is 318648363701. The reversal of 318648363681 is 186363846813.

It is a cyclic number.

It is not a de Polignac number, because 318648363681 - 2¹⁸ = 318648101537 is a prime.

It is a super-2 number, since 2×318648363681² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (318648363611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15929596 + ... + 15949586.

It is an arithmetic number, because the mean of its divisors is an integer number (14326407144).

Almost surely, 2^318648363681 is an apocalyptic number.

It is an amenable number.

318648363681 is a deficient number, since it is larger than the sum of its proper divisors (139796664927).

318648363681 is a wasteful number, since it uses less digits than its factorization.

318648363681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25961.

The product of its digits is 11943936, while the sum is 57.

The spelling of 318648363681 in words is "three hundred eighteen billion, six hundred forty-eight million, three hundred sixty-three thousand, six hundred eighty-one".