311656584949 has 2 divisors, whose sum is σ = 311656584950. Its totient is φ = 311656584948.

The previous prime is 311656584893. The next prime is 311656584973. The reversal of 311656584949 is 949485656113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296799412849 + 14857172100 = 544793^2 + 121890^2 .

It is an emirp because it is prime and its reverse (949485656113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311656584949 - 2⁷ = 311656584821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311656584149) 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 as a sum of consecutive naturals, namely, 155828292474 + 155828292475.

It is an arithmetic number, because the mean of its divisors is an integer number (155828292475).

Almost surely, 2^311656584949 is an apocalyptic number.

It is an amenable number.

311656584949 is a deficient number, since it is larger than the sum of its proper divisors (1).

311656584949 is an equidigital number, since it uses as much as digits as its factorization.

311656584949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27993600, while the sum is 61.

The spelling of 311656584949 in words is "three hundred eleven billion, six hundred fifty-six million, five hundred eighty-four thousand, nine hundred forty-nine".