68636518 has 16 divisors (see below), whose sum is σ = 104607216. Its totient is φ = 33770880.

The previous prime is 68636507. The next prime is 68636549. The reversal of 68636518 is 81563686.

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, 51298 + ... + 52618.

It is an arithmetic number, because the mean of its divisors is an integer number (6537951).

Almost surely, 2^68636518 is an apocalyptic number.

68636518 is a deficient number, since it is larger than the sum of its proper divisors (35970698).

68636518 is a wasteful number, since it uses less digits than its factorization.

68636518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719.

The product of its digits is 207360, while the sum is 43.

The square root of 68636518 is about 8284.7159275379. The cubic root of 68636518 is about 409.4351094301.

The spelling of 68636518 in words is "sixty-eight million, six hundred thirty-six thousand, five hundred eighteen".