311234480665 has 4 divisors (see below), whose sum is σ = 373481376804. Its totient is φ = 248987584528.

The previous prime is 311234480663. The next prime is 311234480681. The reversal of 311234480665 is 566084432113.

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 141619000329 + 169615480336 = 376323^2 + 411844^2 .

It is a cyclic number.

It is not a de Polignac number, because 311234480665 - 2¹ = 311234480663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311234480663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31123448062 + ... + 31123448071.

It is an arithmetic number, because the mean of its divisors is an integer number (93370344201).

Almost surely, 2^311234480665 is an apocalyptic number.

It is an amenable number.

311234480665 is a deficient number, since it is larger than the sum of its proper divisors (62246896139).

311234480665 is an equidigital number, since it uses as much as digits as its factorization.

311234480665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62246896138.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 311234480665 in words is "three hundred eleven billion, two hundred thirty-four million, four hundred eighty thousand, six hundred sixty-five".