427781448257 has 2 divisors, whose sum is σ = 427781448258. Its totient is φ = 427781448256.

The previous prime is 427781448253. The next prime is 427781448317. The reversal of 427781448257 is 752844187724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407329874176 + 20451574081 = 638224^2 + 143009^2 .

It is a cyclic number.

It is not a de Polignac number, because 427781448257 - 2² = 427781448253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 427781448196 and 427781448205.

It is not a weakly prime, because it can be changed into another prime (427781448253) 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, 213890724128 + 213890724129.

It is an arithmetic number, because the mean of its divisors is an integer number (213890724129).

Almost surely, 2^427781448257 is an apocalyptic number.

It is an amenable number.

427781448257 is a deficient number, since it is larger than the sum of its proper divisors (1).

427781448257 is an equidigital number, since it uses as much as digits as its factorization.

427781448257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28098560, while the sum is 59.

The spelling of 427781448257 in words is "four hundred twenty-seven billion, seven hundred eighty-one million, four hundred forty-eight thousand, two hundred fifty-seven".