1227663686399 has 4 divisors (see below), whose sum is σ = 1234024638336. Its totient is φ = 1221302734464.

The previous prime is 1227663686321. The next prime is 1227663686419. The reversal of 1227663686399 is 9936863667221.

It is a happy number.

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 1227663686399 - 2¹² = 1227663682303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227663686999) 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, 3180475679 + ... + 3180476064.

It is an arithmetic number, because the mean of its divisors is an integer number (308506159584).

Almost surely, 2^{1227663686399} is an apocalyptic number.

1227663686399 is a deficient number, since it is larger than the sum of its proper divisors (6360951937).

1227663686399 is an equidigital number, since it uses as much as digits as its factorization.

1227663686399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360951936.

The product of its digits is 211631616, while the sum is 68.

The spelling of 1227663686399 in words is "one trillion, two hundred twenty-seven billion, six hundred sixty-three million, six hundred eighty-six thousand, three hundred ninety-nine".