1218641464289 has 8 divisors (see below), whose sum is σ = 1293785582760. Its totient is φ = 1143881715456.

The previous prime is 1218641464279. The next prime is 1218641464291. The reversal of 1218641464289 is 9824641468121.

It can be written as a sum of positive squares in 4 ways, for example, as 453882469264 + 764758995025 = 673708^2 + 874505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1218641464289 - 2⁴ = 1218641464273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218641464279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96085874 + ... + 96098555.

It is an arithmetic number, because the mean of its divisors is an integer number (161723197845).

Almost surely, 2^{1218641464289} is an apocalyptic number.

It is an amenable number.

1218641464289 is a deficient number, since it is larger than the sum of its proper divisors (75144118471).

1218641464289 is a wasteful number, since it uses less digits than its factorization.

1218641464289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192184819.

The product of its digits is 5308416, while the sum is 56.

The spelling of 1218641464289 in words is "one trillion, two hundred eighteen billion, six hundred forty-one million, four hundred sixty-four thousand, two hundred eighty-nine".