63256385657 has 2 divisors, whose sum is σ = 63256385658. Its totient is φ = 63256385656.

The previous prime is 63256385641. The next prime is 63256385659. The reversal of 63256385657 is 75658365236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39162826816 + 24093558841 = 197896^2 + 155221^2 .

It is a cyclic number.

It is not a de Polignac number, because 63256385657 - 2⁴ = 63256385641 is a prime.

Together with 63256385659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63256385659) 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, 31628192828 + 31628192829.

It is an arithmetic number, because the mean of its divisors is an integer number (31628192829).

Almost surely, 2^63256385657 is an apocalyptic number.

It is an amenable number.

63256385657 is a deficient number, since it is larger than the sum of its proper divisors (1).

63256385657 is an equidigital number, since it uses as much as digits as its factorization.

63256385657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216000, while the sum is 56.

The spelling of 63256385657 in words is "sixty-three billion, two hundred fifty-six million, three hundred eighty-five thousand, six hundred fifty-seven".