63775228477 has 2 divisors, whose sum is σ = 63775228478. Its totient is φ = 63775228476.

The previous prime is 63775228471. The next prime is 63775228541. The reversal of 63775228477 is 77482257736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39016520676 + 24758707801 = 197526^2 + 157349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63775228477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63775228471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31887614238 + 31887614239.

It is an arithmetic number, because the mean of its divisors is an integer number (31887614239).

Almost surely, 2^63775228477 is an apocalyptic number.

It is an amenable number.

63775228477 is a deficient number, since it is larger than the sum of its proper divisors (1).

63775228477 is an equidigital number, since it uses as much as digits as its factorization.

63775228477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27659520, while the sum is 58.

The spelling of 63775228477 in words is "sixty-three billion, seven hundred seventy-five million, two hundred twenty-eight thousand, four hundred seventy-seven".