68350561 has 4 divisors (see below), whose sum is σ = 69471124. Its totient is φ = 67230000.

The previous prime is 68350559. The next prime is 68350571. The reversal of 68350561 is 16505386.

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 18011536 + 50339025 = 4244^2 + 7095^2 .

It is a cyclic number.

It is not a de Polignac number, because 68350561 - 2¹ = 68350559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68350501) 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 3 ways as a sum of consecutive naturals, for example, 560190 + ... + 560311.

It is an arithmetic number, because the mean of its divisors is an integer number (17367781).

Almost surely, 2^68350561 is an apocalyptic number.

68350561 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

68350561 is a deficient number, since it is larger than the sum of its proper divisors (1120563).

68350561 is a wasteful number, since it uses less digits than its factorization.

68350561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120562.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 68350561 is about 8267.4398092759. The cubic root of 68350561 is about 408.8657147285.

The spelling of 68350561 in words is "sixty-eight million, three hundred fifty thousand, five hundred sixty-one".