311643316342660 has 12 divisors (see below), whose sum is σ = 654450964319628. Its totient is φ = 124657326537056.

The previous prime is 311643316342651. The next prime is 311643316342661. The reversal of 311643316342660 is 66243613346113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 203558474481664 + 108084841860996 = 14267392^2 + 10396386^2 .

It is not an unprimeable number, because it can be changed into a prime (311643316342661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7791082908547 + ... + 7791082908586.

It is an arithmetic number, because the mean of its divisors is an integer number (54537580359969).

Almost surely, 2^{311643316342660} is an apocalyptic number.

It is an amenable number.

311643316342660 is an abundant number, since it is smaller than the sum of its proper divisors (342807647976968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311643316342660 is a wasteful number, since it uses less digits than its factorization.

311643316342660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15582165817142 (or 15582165817140 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 49.

Adding to 311643316342660 its reverse (66243613346113), we get a palindrome (377886929688773).

The spelling of 311643316342660 in words is "three hundred eleven trillion, six hundred forty-three billion, three hundred sixteen million, three hundred forty-two thousand, six hundred sixty".