68285842561 has 4 divisors (see below), whose sum is σ = 68352076224. Its totient is φ = 68219608900.

The previous prime is 68285842531. The next prime is 68285842567. The reversal of 68285842561 is 16524858286.

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 68285842561 - 2⁹ = 68285842049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68285842567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33115285 + ... + 33117346.

It is an arithmetic number, because the mean of its divisors is an integer number (17088019056).

Almost surely, 2^68285842561 is an apocalyptic number.

It is an amenable number.

68285842561 is a deficient number, since it is larger than the sum of its proper divisors (66233663).

68285842561 is a wasteful number, since it uses less digits than its factorization.

68285842561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66233662.

The product of its digits is 7372800, while the sum is 55.

The spelling of 68285842561 in words is "sixty-eight billion, two hundred eighty-five million, eight hundred forty-two thousand, five hundred sixty-one".