1227606474781 has 2 divisors, whose sum is σ = 1227606474782. Its totient is φ = 1227606474780.

The previous prime is 1227606474739. The next prime is 1227606474821. The reversal of 1227606474781 is 1874746067221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1155390661881 + 72215812900 = 1074891^2 + 268730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227606474781 - 2¹¹ = 1227606472733 is a prime.

It is a super-2 number, since 2×1227606474781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1227606471781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613803237390 + 613803237391.

It is an arithmetic number, because the mean of its divisors is an integer number (613803237391).

Almost surely, 2^{1227606474781} is an apocalyptic number.

It is an amenable number.

1227606474781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227606474781 is an equidigital number, since it uses as much as digits as its factorization.

1227606474781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6322176, while the sum is 55.

The spelling of 1227606474781 in words is "one trillion, two hundred twenty-seven billion, six hundred six million, four hundred seventy-four thousand, seven hundred eighty-one".