68755559 has 4 divisors (see below), whose sum is σ = 68783616. Its totient is φ = 68727504.

The previous prime is 68755543. The next prime is 68755567. The reversal of 68755559 is 95555786.

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

It is a cyclic number.

It is not a de Polignac number, because 68755559 - 2⁴ = 68755543 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 (68755459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9959 + ... + 15384.

It is an arithmetic number, because the mean of its divisors is an integer number (17195904).

Almost surely, 2^68755559 is an apocalyptic number.

68755559 is a deficient number, since it is larger than the sum of its proper divisors (28057).

68755559 is a wasteful number, since it uses less digits than its factorization.

68755559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28056.

The product of its digits is 1890000, while the sum is 50.

The square root of 68755559 is about 8291.8971894253. The cubic root of 68755559 is about 409.6716764741.

The spelling of 68755559 in words is "sixty-eight million, seven hundred fifty-five thousand, five hundred fifty-nine".