63639532 has 12 divisors (see below), whose sum is σ = 121493736. Its totient is φ = 28927040.

The previous prime is 63639529. The next prime is 63639533. The reversal of 63639532 is 23593636.

It is a junction number, because it is equal to n+sod(n) for n = 63639491 and 63639500.

It is not an unprimeable number, because it can be changed into a prime (63639533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723133 + ... + 723220.

It is an arithmetic number, because the mean of its divisors is an integer number (10124478).

Almost surely, 2^63639532 is an apocalyptic number.

It is an amenable number.

63639532 is a deficient number, since it is larger than the sum of its proper divisors (57854204).

63639532 is a wasteful number, since it uses less digits than its factorization.

63639532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446368 (or 1446366 counting only the distinct ones).

The product of its digits is 87480, while the sum is 37.

The square root of 63639532 is about 7977.4389374034. The cubic root of 63639532 is about 399.2476106630.

The spelling of 63639532 in words is "sixty-three million, six hundred thirty-nine thousand, five hundred thirty-two".