63898417971 has 16 divisors (see below), whose sum is σ = 94765389600. Its totient is φ = 42553465344.

The previous prime is 63898417927. The next prime is 63898417987. The reversal of 63898417971 is 17971489836.

63898417971 is a `hidden beast` number, since 6 + 389 + 84 + 179 + 7 + 1 = 666.

It is not a de Polignac number, because 63898417971 - 2¹⁰ = 63898416947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63898417899 and 63898417908.

It is not an unprimeable number, because it can be changed into a prime (63898417991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1237566 + ... + 1288163.

It is an arithmetic number, because the mean of its divisors is an integer number (5922836850).

Almost surely, 2^63898417971 is an apocalyptic number.

63898417971 is a deficient number, since it is larger than the sum of its proper divisors (30866971629).

63898417971 is a wasteful number, since it uses less digits than its factorization.

63898417971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526675 (or 2526669 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 63898417971 in words is "sixty-three billion, eight hundred ninety-eight million, four hundred seventeen thousand, nine hundred seventy-one".