1216116622166 has 4 divisors (see below), whose sum is σ = 1824174933252. Its totient is φ = 608058311082.

The previous prime is 1216116622153. The next prime is 1216116622169. The reversal of 1216116622166 is 6612266116121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216116622169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304029155540 + ... + 304029155543.

It is an arithmetic number, because the mean of its divisors is an integer number (456043733313).

Almost surely, 2^{1216116622166} is an apocalyptic number.

1216116622166 is a deficient number, since it is larger than the sum of its proper divisors (608058311086).

1216116622166 is an equidigital number, since it uses as much as digits as its factorization.

1216116622166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608058311085.

The product of its digits is 62208, while the sum is 41.

The spelling of 1216116622166 in words is "one trillion, two hundred sixteen billion, one hundred sixteen million, six hundred twenty-two thousand, one hundred sixty-six".