63888520816 has 20 divisors (see below), whose sum is σ = 124687546272. Its totient is φ = 31711089536.

The previous prime is 63888520799. The next prime is 63888520819. The reversal of 63888520816 is 61802588836.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63888520819) 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 in 3 ways as a sum of consecutive naturals, for example, 14570920 + ... + 14575303.

Almost surely, 2^63888520816 is an apocalyptic number.

It is an amenable number.

63888520816 is a deficient number, since it is larger than the sum of its proper divisors (60799025456).

63888520816 is a wasteful number, since it uses less digits than its factorization.

63888520816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29146368 (or 29146362 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 63888520816 in words is "sixty-three billion, eight hundred eighty-eight million, five hundred twenty thousand, eight hundred sixteen".