68305816 has 8 divisors (see below), whose sum is σ = 128073420. Its totient is φ = 34152904.

The previous prime is 68305793. The next prime is 68305819. The reversal of 68305816 is 61850386.

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 (68305819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4269106 + ... + 4269121.

Almost surely, 2^68305816 is an apocalyptic number.

It is an amenable number.

68305816 is a deficient number, since it is larger than the sum of its proper divisors (59767604).

68305816 is a wasteful number, since it uses less digits than its factorization.

68305816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538233 (or 8538229 counting only the distinct ones).

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

The square root of 68305816 is about 8264.7332685332. The cubic root of 68305816 is about 408.7764753244.

The spelling of 68305816 in words is "sixty-eight million, three hundred five thousand, eight hundred sixteen".