68644216 has 8 divisors (see below), whose sum is σ = 128707920. Its totient is φ = 34322104.

The previous prime is 68644193. The next prime is 68644217. The reversal of 68644216 is 61244686.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68644217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4290256 + ... + 4290271.

It is an arithmetic number, because the mean of its divisors is an integer number (16088490).

Almost surely, 2^68644216 is an apocalyptic number.

It is an amenable number.

68644216 is a deficient number, since it is larger than the sum of its proper divisors (60063704).

68644216 is a wasteful number, since it uses less digits than its factorization.

68644216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8580533 (or 8580529 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 68644216 is about 8285.1805049739. The cubic root of 68644216 is about 409.4504157313.

The spelling of 68644216 in words is "sixty-eight million, six hundred forty-four thousand, two hundred sixteen".