63857606867 has 2 divisors, whose sum is σ = 63857606868. Its totient is φ = 63857606866.

The previous prime is 63857606849. The next prime is 63857606873. The reversal of 63857606867 is 76860675836.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63857606867 - 2⁸ = 63857606611 is a prime.

It is not a weakly prime, because it can be changed into another prime (63857606767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31928803433 + 31928803434.

It is an arithmetic number, because the mean of its divisors is an integer number (31928803434).

Almost surely, 2^63857606867 is an apocalyptic number.

63857606867 is a deficient number, since it is larger than the sum of its proper divisors (1).

63857606867 is an equidigital number, since it uses as much as digits as its factorization.

63857606867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 63857606867 in words is "sixty-three billion, eight hundred fifty-seven million, six hundred six thousand, eight hundred sixty-seven".