1343661178897 has 4 divisors (see below), whose sum is σ = 1344500444196. Its totient is φ = 1342821913600.

The previous prime is 1343661178879. The next prime is 1343661178903. The reversal of 1343661178897 is 7988711663431.

It is a Cunningham number, because it is equal to 1159164²+1.

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 1340306336656 + 3354842241 = 1157716^2 + 57921^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343661178897 - 2³⁵ = 1309301440529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1343661178817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419630248 + ... + 419633449.

It is an arithmetic number, because the mean of its divisors is an integer number (336125111049).

Almost surely, 2^{1343661178897} is an apocalyptic number.

It is an amenable number.

1343661178897 is a deficient number, since it is larger than the sum of its proper divisors (839265299).

1343661178897 is an equidigital number, since it uses as much as digits as its factorization.

1343661178897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839265298.

The product of its digits is 36578304, while the sum is 64.

The spelling of 1343661178897 in words is "one trillion, three hundred forty-three billion, six hundred sixty-one million, one hundred seventy-eight thousand, eight hundred ninety-seven".