1227726985957 has 2 divisors, whose sum is σ = 1227726985958. Its totient is φ = 1227726985956.

The previous prime is 1227726985949. The next prime is 1227726985981. The reversal of 1227726985957 is 7595896277221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1161493331076 + 66233654881 = 1077726^2 + 257359^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227726985957 - 2³ = 1227726985949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1227726980957) 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 as a sum of consecutive naturals, namely, 613863492978 + 613863492979.

It is an arithmetic number, because the mean of its divisors is an integer number (613863492979).

Almost surely, 2^{1227726985957} is an apocalyptic number.

It is an amenable number.

1227726985957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227726985957 is an equidigital number, since it uses as much as digits as its factorization.

1227726985957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 266716800, while the sum is 70.

The spelling of 1227726985957 in words is "one trillion, two hundred twenty-seven billion, seven hundred twenty-six million, nine hundred eighty-five thousand, nine hundred fifty-seven".