311405242656 has 48 divisors (see below), whose sum is σ = 817468745184. Its totient is φ = 103797940224.

The previous prime is 311405242639. The next prime is 311405242663. The reversal of 311405242656 is 656242504113.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4023136 + ... + 4099808.

It is an arithmetic number, because the mean of its divisors is an integer number (17030598858).

Almost surely, 2^311405242656 is an apocalyptic number.

It is an amenable number.

311405242656 is an abundant number, since it is smaller than the sum of its proper divisors (506063502528).

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

311405242656 is a wasteful number, since it uses less digits than its factorization.

311405242656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118993 (or 118985 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 311405242656 its reverse (656242504113), we get a palindrome (967647746769).

The spelling of 311405242656 in words is "three hundred eleven billion, four hundred five million, two hundred forty-two thousand, six hundred fifty-six".