63821612657843 has 2 divisors, whose sum is σ = 63821612657844. Its totient is φ = 63821612657842.

The previous prime is 63821612657837. The next prime is 63821612657899. The reversal of 63821612657843 is 34875621612836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63821612657843 - 2⁶ = 63821612657779 is a prime.

It is not a weakly prime, because it can be changed into another prime (63821612657443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31910806328921 + 31910806328922.

It is an arithmetic number, because the mean of its divisors is an integer number (31910806328922).

Almost surely, 2^{63821612657843} is an apocalyptic number.

63821612657843 is a deficient number, since it is larger than the sum of its proper divisors (1).

63821612657843 is an equidigital number, since it uses as much as digits as its factorization.

63821612657843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69672960, while the sum is 62.

The spelling of 63821612657843 in words is "sixty-three trillion, eight hundred twenty-one billion, six hundred twelve million, six hundred fifty-seven thousand, eight hundred forty-three".