318688130641 has 4 divisors (see below), whose sum is σ = 324701114292. Its totient is φ = 312675146992.

The previous prime is 318688130639. The next prime is 318688130647. The reversal of 318688130641 is 146031886813.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 253080431041 + 65607699600 = 503071^2 + 256140^2 .

It is a cyclic number.

It is not a de Polignac number, because 318688130641 - 2¹ = 318688130639 is a prime.

It is a super-2 number, since 2×318688130641² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318688130647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3006491746 + ... + 3006491851.

It is an arithmetic number, because the mean of its divisors is an integer number (81175278573).

Almost surely, 2^318688130641 is an apocalyptic number.

It is an amenable number.

318688130641 is a deficient number, since it is larger than the sum of its proper divisors (6012983651).

318688130641 is an equidigital number, since it uses as much as digits as its factorization.

318688130641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012983650.

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 318688130641 in words is "three hundred eighteen billion, six hundred eighty-eight million, one hundred thirty thousand, six hundred forty-one".