1316464611721 has 8 divisors (see below), whose sum is σ = 1535235699200. Its totient is φ = 1128398238324.

The previous prime is 1316464611713. The next prime is 1316464611733. The reversal of 1316464611721 is 1271164646131.

It is not a de Polignac number, because 1316464611721 - 2³ = 1316464611713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1316464611751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1919044281 + ... + 1919044966.

It is an arithmetic number, because the mean of its divisors is an integer number (191904462400).

Almost surely, 2^{1316464611721} is an apocalyptic number.

It is an amenable number.

1316464611721 is a deficient number, since it is larger than the sum of its proper divisors (218771087479).

1316464611721 is an frugal number, since it uses more digits than its factorization.

1316464611721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838089268 (or 3838089254 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The spelling of 1316464611721 in words is "one trillion, three hundred sixteen billion, four hundred sixty-four million, six hundred eleven thousand, seven hundred twenty-one".