68085553 has 4 divisors (see below), whose sum is σ = 68108148. Its totient is φ = 68062960.

The previous prime is 68085499. The next prime is 68085571. The reversal of 68085553 is 35558086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23155344 + 44930209 = 4812^2 + 6703^2 .

It is a cyclic number.

It is not a de Polignac number, because 68085553 - 2⁹ = 68085041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68085653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5926 + ... + 13087.

It is an arithmetic number, because the mean of its divisors is an integer number (17027037).

Almost surely, 2^68085553 is an apocalyptic number.

It is an amenable number.

68085553 is a deficient number, since it is larger than the sum of its proper divisors (22595).

68085553 is a wasteful number, since it uses less digits than its factorization.

68085553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22594.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 68085553 is about 8251.3970332302. The cubic root of 68085553 is about 408.3366138660.

The spelling of 68085553 in words is "sixty-eight million, eighty-five thousand, five hundred fifty-three".