1218562738153 has 4 divisors (see below), whose sum is σ = 1218566769280. Its totient is φ = 1218558707028.

The previous prime is 1218562738117. The next prime is 1218562738201. The reversal of 1218562738153 is 3518372658121.

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 1218562738153 - 2³⁷ = 1081123784681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1218562738153.

It is not an unprimeable number, because it can be changed into a prime (1218562735153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521813 + ... + 2180146.

It is an arithmetic number, because the mean of its divisors is an integer number (304641692320).

Almost surely, 2^{1218562738153} is an apocalyptic number.

It is an amenable number.

1218562738153 is a deficient number, since it is larger than the sum of its proper divisors (4031127).

1218562738153 is an equidigital number, since it uses as much as digits as its factorization.

1218562738153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031126.

The product of its digits is 2419200, while the sum is 52.

The spelling of 1218562738153 in words is "one trillion, two hundred eighteen billion, five hundred sixty-two million, seven hundred thirty-eight thousand, one hundred fifty-three".