63915697871 has 2 divisors, whose sum is σ = 63915697872. Its totient is φ = 63915697870.

The previous prime is 63915697847. The next prime is 63915697883. The reversal of 63915697871 is 17879651936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63915697871 - 2²² = 63911503567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63915697801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31957848935 + 31957848936.

It is an arithmetic number, because the mean of its divisors is an integer number (31957848936).

Almost surely, 2^63915697871 is an apocalyptic number.

63915697871 is a deficient number, since it is larger than the sum of its proper divisors (1).

63915697871 is an equidigital number, since it uses as much as digits as its factorization.

63915697871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 62.

The spelling of 63915697871 in words is "sixty-three billion, nine hundred fifteen million, six hundred ninety-seven thousand, eight hundred seventy-one".