63681872 has 10 divisors (see below), whose sum is σ = 123383658. Its totient is φ = 31840928.

The previous prime is 63681853. The next prime is 63681889. The reversal of 63681872 is 27818636.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51036736 + 12645136 = 7144^2 + 3556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990043 + ... + 1990074.

Almost surely, 2^63681872 is an apocalyptic number.

It is an amenable number.

63681872 is a deficient number, since it is larger than the sum of its proper divisors (59701786).

63681872 is a wasteful number, since it uses less digits than its factorization.

63681872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980125 (or 3980119 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 63681872 is about 7980.0922300435. The cubic root of 63681872 is about 399.3361321415.

The spelling of 63681872 in words is "sixty-three million, six hundred eighty-one thousand, eight hundred seventy-two".