67798722389 has 4 divisors (see below), whose sum is σ = 67811243724. Its totient is φ = 67786201056.

The previous prime is 67798722373. The next prime is 67798722419. The reversal of 67798722389 is 98322789776.

It is a happy number.

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 21567272164 + 46231450225 = 146858^2 + 215015^2 .

It is a cyclic number.

It is not a de Polignac number, because 67798722389 - 2⁴ = 67798722373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67798722319) 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, 6252542 + ... + 6263375.

It is an arithmetic number, because the mean of its divisors is an integer number (16952810931).

Almost surely, 2^67798722389 is an apocalyptic number.

It is an amenable number.

67798722389 is a deficient number, since it is larger than the sum of its proper divisors (12521335).

67798722389 is a wasteful number, since it uses less digits than its factorization.

67798722389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12521334.

The product of its digits is 128024064, while the sum is 68.

The spelling of 67798722389 in words is "sixty-seven billion, seven hundred ninety-eight million, seven hundred twenty-two thousand, three hundred eighty-nine".