311663478732 has 96 divisors (see below), whose sum is σ = 755906618880. Its totient is φ = 99824524800.

The previous prime is 311663478649. The next prime is 311663478739. The reversal of 311663478732 is 237874366113.

It is not an unprimeable number, because it can be changed into a prime (311663478739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80928607 + ... + 80932457.

It is an arithmetic number, because the mean of its divisors is an integer number (7874027280).

Almost surely, 2^311663478732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311663478732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377953309440).

311663478732 is an abundant number, since it is smaller than the sum of its proper divisors (444243140148).

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

311663478732 is a wasteful number, since it uses less digits than its factorization.

311663478732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943 (or 4941 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 51.

The spelling of 311663478732 in words is "three hundred eleven billion, six hundred sixty-three million, four hundred seventy-eight thousand, seven hundred thirty-two".