63934657819 has 2 divisors, whose sum is σ = 63934657820. Its totient is φ = 63934657818.

The previous prime is 63934657811. The next prime is 63934657879. The reversal of 63934657819 is 91875643936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63934657819 - 2³ = 63934657811 is a prime.

It is a super-2 number, since 2×63934657819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63934657811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31967328909 + 31967328910.

It is an arithmetic number, because the mean of its divisors is an integer number (31967328910).

Almost surely, 2^63934657819 is an apocalyptic number.

63934657819 is a deficient number, since it is larger than the sum of its proper divisors (1).

63934657819 is an equidigital number, since it uses as much as digits as its factorization.

63934657819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 61.

The spelling of 63934657819 in words is "sixty-three billion, nine hundred thirty-four million, six hundred fifty-seven thousand, eight hundred nineteen".