68894252689 has 4 divisors (see below), whose sum is σ = 70496444656. Its totient is φ = 67292060724.

The previous prime is 68894252659. The next prime is 68894252731. The reversal of 68894252689 is 98625249886.

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 68894252689 - 2¹⁷ = 68894121617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68894252629) 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, 801095919 + ... + 801096004.

It is an arithmetic number, because the mean of its divisors is an integer number (17624111164).

Almost surely, 2^68894252689 is an apocalyptic number.

It is an amenable number.

68894252689 is a deficient number, since it is larger than the sum of its proper divisors (1602191967).

68894252689 is a wasteful number, since it uses less digits than its factorization.

68894252689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602191966.

The product of its digits is 119439360, while the sum is 67.

The spelling of 68894252689 in words is "sixty-eight billion, eight hundred ninety-four million, two hundred fifty-two thousand, six hundred eighty-nine".