1318890260517 has 4 divisors (see below), whose sum is σ = 1758520347360. Its totient is φ = 879260173676.

The previous prime is 1318890260491. The next prime is 1318890260531. The reversal of 1318890260517 is 7150620988131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1318890260517 - 2⁴⁰ = 219378632741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1318890260517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318890260537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219815043417 + ... + 219815043422.

It is an arithmetic number, because the mean of its divisors is an integer number (439630086840).

Almost surely, 2^{1318890260517} is an apocalyptic number.

It is an amenable number.

1318890260517 is a deficient number, since it is larger than the sum of its proper divisors (439630086843).

1318890260517 is an equidigital number, since it uses as much as digits as its factorization.

1318890260517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439630086842.

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 1318890260517 in words is "one trillion, three hundred eighteen billion, eight hundred ninety million, two hundred sixty thousand, five hundred seventeen".