1318217487266 has 4 divisors (see below), whose sum is σ = 1977326230902. Its totient is φ = 659108743632.

The previous prime is 1318217487259. The next prime is 1318217487299. The reversal of 1318217487266 is 6627847128131.

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

It can be written as a sum of positive squares in only one way, i.e., 808328663041 + 509888824225 = 899071^2 + 714065^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329554371815 + ... + 329554371818.

Almost surely, 2^{1318217487266} is an apocalyptic number.

1318217487266 is a deficient number, since it is larger than the sum of its proper divisors (659108743636).

1318217487266 is an equidigital number, since it uses as much as digits as its factorization.

1318217487266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659108743635.

The product of its digits is 5419008, while the sum is 56.

The spelling of 1318217487266 in words is "one trillion, three hundred eighteen billion, two hundred seventeen million, four hundred eighty-seven thousand, two hundred sixty-six".