1218486374813 has 4 divisors (see below), whose sum is σ = 1218489196320. Its totient is φ = 1218483553308.

The previous prime is 1218486374779. The next prime is 1218486374837. The reversal of 1218486374813 is 3184736848121.

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 1218486374813 - 2¹⁰ = 1218486373789 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 (1218486374873) 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, 612353 + ... + 1676886.

It is an arithmetic number, because the mean of its divisors is an integer number (304622299080).

Almost surely, 2^{1218486374813} is an apocalyptic number.

It is an amenable number.

1218486374813 is a deficient number, since it is larger than the sum of its proper divisors (2821507).

1218486374813 is an equidigital number, since it uses as much as digits as its factorization.

1218486374813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821506.

The product of its digits is 6193152, while the sum is 56.

The spelling of 1218486374813 in words is "one trillion, two hundred eighteen billion, four hundred eighty-six million, three hundred seventy-four thousand, eight hundred thirteen".