63857606849 has 2 divisors, whose sum is σ = 63857606850. Its totient is φ = 63857606848.

The previous prime is 63857606783. The next prime is 63857606867. The reversal of 63857606849 is 94860675836.

63857606849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61203296449 + 2654310400 = 247393^2 + 51520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63857606849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63857606791 and 63857606800.

It is not a weakly prime, because it can be changed into another prime (63857006849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31928803424 + 31928803425.

It is an arithmetic number, because the mean of its divisors is an integer number (31928803425).

Almost surely, 2^63857606849 is an apocalyptic number.

It is an amenable number.

63857606849 is a deficient number, since it is larger than the sum of its proper divisors (1).

63857606849 is an equidigital number, since it uses as much as digits as its factorization.

63857606849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 63857606849 in words is "sixty-three billion, eight hundred fifty-seven million, six hundred six thousand, eight hundred forty-nine".