63689481632 has 48 divisors (see below), whose sum is σ = 151730832960. Its totient is φ = 25689873408.

The previous prime is 63689481607. The next prime is 63689481637. The reversal of 63689481632 is 23618498636.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (63689481637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8358782 + ... + 8366397.

It is an arithmetic number, because the mean of its divisors is an integer number (3161059020).

Almost surely, 2^63689481632 is an apocalyptic number.

It is an amenable number.

63689481632 is an abundant number, since it is smaller than the sum of its proper divisors (88041351328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63689481632 is a wasteful number, since it uses less digits than its factorization.

63689481632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16725213 (or 16725205 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 56.

The spelling of 63689481632 in words is "sixty-three billion, six hundred eighty-nine million, four hundred eighty-one thousand, six hundred thirty-two".