1291168599617 has 8 divisors (see below), whose sum is σ = 1393221074280. Its totient is φ = 1189506384000.

The previous prime is 1291168599613. The next prime is 1291168599629. The reversal of 1291168599617 is 7169958611921.

It is a Cunningham number, because it is equal to 1136296²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 191000465296 + 1100168134321 = 437036^2 + 1048889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1291168599617 - 2² = 1291168599613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291168599613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97557884 + ... + 97571117.

It is an arithmetic number, because the mean of its divisors is an integer number (174152634285).

Almost surely, 2^{1291168599617} is an apocalyptic number.

It is an amenable number.

1291168599617 is a deficient number, since it is larger than the sum of its proper divisors (102052474663).

1291168599617 is a wasteful number, since it uses less digits than its factorization.

1291168599617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195129523.

The product of its digits is 14696640, while the sum is 65.

The spelling of 1291168599617 in words is "one trillion, two hundred ninety-one billion, one hundred sixty-eight million, five hundred ninety-nine thousand, six hundred seventeen".