311244698647873 has 4 divisors (see below), whose sum is σ = 329553210333060. Its totient is φ = 292936186962688.

The previous prime is 311244698647777. The next prime is 311244698647877. The reversal of 311244698647873 is 378746896442113.

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 233979332882689 + 77265365765184 = 15296383^2 + 8790072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311244698647873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311244698647796 and 311244698647805.

It is not an unprimeable number, because it can be changed into a prime (311244698647877) 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, 9154255842568 + ... + 9154255842601.

It is an arithmetic number, because the mean of its divisors is an integer number (82388302583265).

Almost surely, 2^{311244698647873} is an apocalyptic number.

It is an amenable number.

311244698647873 is a deficient number, since it is larger than the sum of its proper divisors (18308511685187).

311244698647873 is a wasteful number, since it uses less digits than its factorization.

311244698647873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18308511685186.

The product of its digits is 1170505728, while the sum is 73.

The spelling of 311244698647873 in words is "three hundred eleven trillion, two hundred forty-four billion, six hundred ninety-eight million, six hundred forty-seven thousand, eight hundred seventy-three".