311944437449 has 4 divisors (see below), whose sum is σ = 311952534036. Its totient is φ = 311936340864.

The previous prime is 311944437407. The next prime is 311944437463. The reversal of 311944437449 is 944734449113.

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 248821392400 + 63123045049 = 498820^2 + 251243^2 .

It is a cyclic number.

It is not a de Polignac number, because 311944437449 - 2⁸ = 311944437193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 311944437449.

It is not an unprimeable number, because it can be changed into a prime (311944437499) 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, 3990224 + ... + 4067649.

It is an arithmetic number, because the mean of its divisors is an integer number (77988133509).

Almost surely, 2^311944437449 is an apocalyptic number.

It is an amenable number.

311944437449 is a deficient number, since it is larger than the sum of its proper divisors (8096587).

311944437449 is an equidigital number, since it uses as much as digits as its factorization.

311944437449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8096586.

The product of its digits is 5225472, while the sum is 53.

The spelling of 311944437449 in words is "three hundred eleven billion, nine hundred forty-four million, four hundred thirty-seven thousand, four hundred forty-nine".