68643712 has 16 divisors (see below), whose sum is σ = 136751400. Its totient is φ = 34321792.

The previous prime is 68643691. The next prime is 68643737. The reversal of 68643712 is 21734686.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268012 + ... + 268267.

Almost surely, 2^68643712 is an apocalyptic number.

It is an amenable number.

68643712 is a deficient number, since it is larger than the sum of its proper divisors (68107688).

68643712 is an equidigital number, since it uses as much as digits as its factorization.

68643712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536293 (or 536281 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 68643712 is about 8285.1500891656. The cubic root of 68643712 is about 409.4494136390.

The spelling of 68643712 in words is "sixty-eight million, six hundred forty-three thousand, seven hundred twelve".