68559561 has 16 divisors (see below), whose sum is σ = 116080000. Its totient is φ = 39176784.

The previous prime is 68559539. The next prime is 68559571. The reversal of 68559561 is 16595586.

It is a happy number.

68559561 is a `hidden beast` number, since 6 + 85 + 5 + 9 + 561 = 666.

It is not a de Polignac number, because 68559561 - 2⁵ = 68559529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68559571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181186 + ... + 181563.

It is an arithmetic number, because the mean of its divisors is an integer number (7255000).

Almost surely, 2^68559561 is an apocalyptic number.

It is an amenable number.

68559561 is a deficient number, since it is larger than the sum of its proper divisors (47520439).

68559561 is a wasteful number, since it uses less digits than its factorization.

68559561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362765 (or 362759 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 68559561 is about 8280.0701083988. The cubic root of 68559561 is about 409.2820292032.

The spelling of 68559561 in words is "sixty-eight million, five hundred fifty-nine thousand, five hundred sixty-one".