68363561 has 4 divisors (see below), whose sum is σ = 78129792. Its totient is φ = 58597332.

The previous prime is 68363497. The next prime is 68363591. The reversal of 68363561 is 16536386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68363561 - 2⁶ = 68363497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68363591) 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, 4883105 + ... + 4883118.

It is an arithmetic number, because the mean of its divisors is an integer number (19532448).

Almost surely, 2^68363561 is an apocalyptic number.

It is an amenable number.

68363561 is a deficient number, since it is larger than the sum of its proper divisors (9766231).

68363561 is an equidigital number, since it uses as much as digits as its factorization.

68363561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9766230.

The product of its digits is 77760, while the sum is 38.

The square root of 68363561 is about 8268.2259886871. The cubic root of 68363561 is about 408.8916346199.

The spelling of 68363561 in words is "sixty-eight million, three hundred sixty-three thousand, five hundred sixty-one".