1218684733459 has 4 divisors (see below), whose sum is σ = 1282826035240. Its totient is φ = 1154543431680.

The previous prime is 1218684733391. The next prime is 1218684733463. The reversal of 1218684733459 is 9543374868121.

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

It is a cyclic number.

It is not a de Polignac number, because 1218684733459 - 2¹³ = 1218684725267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1218684733397 and 1218684733406.

It is not an unprimeable number, because it can be changed into a prime (1218684733499) 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, 32070650862 + ... + 32070650899.

It is an arithmetic number, because the mean of its divisors is an integer number (320706508810).

Almost surely, 2^{1218684733459} is an apocalyptic number.

1218684733459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1218684733459 is a deficient number, since it is larger than the sum of its proper divisors (64141301781).

1218684733459 is an equidigital number, since it uses as much as digits as its factorization.

1218684733459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64141301780.

The product of its digits is 34836480, while the sum is 61.

The spelling of 1218684733459 in words is "one trillion, two hundred eighteen billion, six hundred eighty-four million, seven hundred thirty-three thousand, four hundred fifty-nine".