1316993553643 has 4 divisors (see below), whose sum is σ = 1329779898928. Its totient is φ = 1304207208360.

The previous prime is 1316993553571. The next prime is 1316993553661. The reversal of 1316993553643 is 3463553996131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1316993553643 - 2¹⁷ = 1316993422571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316993550643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6393172488 + ... + 6393172693.

It is an arithmetic number, because the mean of its divisors is an integer number (332444974732).

Almost surely, 2^{1316993553643} is an apocalyptic number.

1316993553643 is a deficient number, since it is larger than the sum of its proper divisors (12786345285).

1316993553643 is a wasteful number, since it uses less digits than its factorization.

1316993553643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12786345284.

The product of its digits is 23619600, while the sum is 58.

The spelling of 1316993553643 in words is "one trillion, three hundred sixteen billion, nine hundred ninety-three million, five hundred fifty-three thousand, six hundred forty-three".