1218612152266 has 4 divisors (see below), whose sum is σ = 1827918228402. Its totient is φ = 609306076132.

The previous prime is 1218612152227. The next prime is 1218612152267. The reversal of 1218612152266 is 6622512168121.

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

It can be written as a sum of positive squares in only one way, i.e., 1169813133241 + 48799019025 = 1081579^2 + 220905^2 .

It is not an unprimeable number, because it can be changed into a prime (1218612152267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304653038065 + ... + 304653038068.

Almost surely, 2^{1218612152266} is an apocalyptic number.

1218612152266 is a deficient number, since it is larger than the sum of its proper divisors (609306076136).

1218612152266 is an equidigital number, since it uses as much as digits as its factorization.

1218612152266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609306076135.

The product of its digits is 138240, while the sum is 43.

The spelling of 1218612152266 in words is "one trillion, two hundred eighteen billion, six hundred twelve million, one hundred fifty-two thousand, two hundred sixty-six".