1216818634706 has 8 divisors (see below), whose sum is σ = 1831723426044. Its totient is φ = 606244159360.

The previous prime is 1216818634663. The next prime is 1216818634723. The reversal of 1216818634706 is 6074368186121.

It can be written as a sum of positive squares in 2 ways, for example, as 1216739157481 + 79477225 = 1103059^2 + 8915^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082578295 + ... + 1082579418.

Almost surely, 2^{1216818634706} is an apocalyptic number.

1216818634706 is a deficient number, since it is larger than the sum of its proper divisors (614904791338).

1216818634706 is a wasteful number, since it uses less digits than its factorization.

1216818634706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165157996.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 1216818634706 in words is "one trillion, two hundred sixteen billion, eight hundred eighteen million, six hundred thirty-four thousand, seven hundred six".