1227726985969 has 4 divisors (see below), whose sum is σ = 1339338530160. Its totient is φ = 1116115441780.

The previous prime is 1227726985957. The next prime is 1227726985981. The reversal of 1227726985969 is 9695896277221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1227726985957) and next prime (1227726985981).

It is a cyclic number.

It is not a de Polignac number, because 1227726985969 - 2¹⁷ = 1227726854897 is a prime.

It is a super-2 number, since 2×1227726985969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1227726985949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55805772079 + ... + 55805772100.

It is an arithmetic number, because the mean of its divisors is an integer number (334834632540).

Almost surely, 2^{1227726985969} is an apocalyptic number.

It is an amenable number.

1227726985969 is a deficient number, since it is larger than the sum of its proper divisors (111611544191).

1227726985969 is a wasteful number, since it uses less digits than its factorization.

1227726985969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111611544190.

The product of its digits is 411505920, while the sum is 73.

The spelling of 1227726985969 in words is "one trillion, two hundred twenty-seven billion, seven hundred twenty-six million, nine hundred eighty-five thousand, nine hundred sixty-nine".