68508805 has 8 divisors (see below), whose sum is σ = 83025144. Its totient is φ = 54264000.

The previous prime is 68508787. The next prime is 68508809. The reversal of 68508805 is 50880586.

It can be written as a sum of positive squares in 4 ways, for example, as 11249316 + 57259489 = 3354^2 + 7567^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68508805 - 2¹⁹ = 67984517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68508809) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 67326 + ... + 68335.

It is an arithmetic number, because the mean of its divisors is an integer number (10378143).

Almost surely, 2^68508805 is an apocalyptic number.

It is an amenable number.

68508805 is a deficient number, since it is larger than the sum of its proper divisors (14516339).

68508805 is a wasteful number, since it uses less digits than its factorization.

68508805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135767.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 68508805 is about 8277.0045910341. The cubic root of 68508805 is about 409.1810044065.

The spelling of 68508805 in words is "sixty-eight million, five hundred eight thousand, eight hundred five".