1318586843977 has 4 divisors (see below), whose sum is σ = 1420016601220. Its totient is φ = 1217157086736.

The previous prime is 1318586843939. The next prime is 1318586843989. The reversal of 1318586843977 is 7793486858131.

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 140778041616 + 1177808802361 = 375204^2 + 1085269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318586843977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318586849977) 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 in 3 ways as a sum of consecutive naturals, for example, 50714878602 + ... + 50714878627.

It is an arithmetic number, because the mean of its divisors is an integer number (355004150305).

Almost surely, 2^{1318586843977} is an apocalyptic number.

It is an amenable number.

1318586843977 is a deficient number, since it is larger than the sum of its proper divisors (101429757243).

1318586843977 is a wasteful number, since it uses less digits than its factorization.

1318586843977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101429757242.

The product of its digits is 243855360, while the sum is 70.

The spelling of 1318586843977 in words is "one trillion, three hundred eighteen billion, five hundred eighty-six million, eight hundred forty-three thousand, nine hundred seventy-seven".