63851463784 has 8 divisors (see below), whose sum is σ = 119721494610. Its totient is φ = 31925731888.

The previous prime is 63851463779. The next prime is 63851463787. The reversal of 63851463784 is 48736415836.

It can be written as a sum of positive squares in only one way, i.e., 53721041284 + 10130422500 = 231778^2 + 100650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (63851463787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990716479 + ... + 3990716494.

Almost surely, 2^63851463784 is an apocalyptic number.

It is an amenable number.

63851463784 is a deficient number, since it is larger than the sum of its proper divisors (55870030826).

63851463784 is a wasteful number, since it uses less digits than its factorization.

63851463784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7981432979 (or 7981432975 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 55.

The spelling of 63851463784 in words is "sixty-three billion, eight hundred fifty-one million, four hundred sixty-three thousand, seven hundred eighty-four".