63680518 has 16 divisors (see below), whose sum is σ = 104328000. Its totient is φ = 28911400.

The previous prime is 63680509. The next prime is 63680563. The reversal of 63680518 is 81508636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32013 + ... + 33943.

It is an arithmetic number, because the mean of its divisors is an integer number (6520500).

Almost surely, 2^63680518 is an apocalyptic number.

63680518 is a deficient number, since it is larger than the sum of its proper divisors (40647482).

63680518 is a wasteful number, since it uses less digits than its factorization.

63680518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 63680518 is about 7980.0073934803. The cubic root of 63680518 is about 399.3333019015. Note that the first 4 decimals are identical.

The spelling of 63680518 in words is "sixty-three million, six hundred eighty thousand, five hundred eighteen".