1316405644418 has 6 divisors (see below), whose sum is σ = 1974610900521. Its totient is φ = 658202010912.

The previous prime is 1316405644403. The next prime is 1316405644441. The reversal of 1316405644418 is 8144465046131.

It can be written as a sum of positive squares in 2 ways, for example, as 1295938622449 + 20467021969 = 1138393^2 + 143063^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=811297.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 1216946 + ... + 2028242.

Almost surely, 2^{1316405644418} is an apocalyptic number.

1316405644418 is a deficient number, since it is larger than the sum of its proper divisors (658205256103).

1316405644418 is an frugal number, since it uses more digits than its factorization.

1316405644418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622596 (or 811299 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 1316405644418 in words is "one trillion, three hundred sixteen billion, four hundred five million, six hundred forty-four thousand, four hundred eighteen".