1156318312717 has 4 divisors (see below), whose sum is σ = 1156454150940. Its totient is φ = 1156182474496.

The previous prime is 1156318312711. The next prime is 1156318312739. The reversal of 1156318312717 is 7172138136511.

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 653929378281 + 502388934436 = 808659^2 + 708794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156318312717 - 2²³ = 1156309924109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156318312711) 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, 67906342 + ... + 67923367.

It is an arithmetic number, because the mean of its divisors is an integer number (289113537735).

Almost surely, 2^{1156318312717} is an apocalyptic number.

It is an amenable number.

1156318312717 is a deficient number, since it is larger than the sum of its proper divisors (135838223).

1156318312717 is an equidigital number, since it uses as much as digits as its factorization.

1156318312717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135838222.

The product of its digits is 211680, while the sum is 46.

The spelling of 1156318312717 in words is "one trillion, one hundred fifty-six billion, three hundred eighteen million, three hundred twelve thousand, seven hundred seventeen".