678945112289 has 8 divisors (see below), whose sum is σ = 693696455040. Its totient is φ = 664206507216.

The previous prime is 678945112273. The next prime is 678945112291. The reversal of 678945112289 is 982211549876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 678945112289 - 2⁴ = 678945112273 is a prime.

It is a super-2 number, since 2×678945112289² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678945112249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3076619 + ... + 3289904.

It is an arithmetic number, because the mean of its divisors is an integer number (86712056880).

Almost surely, 2^678945112289 is an apocalyptic number.

It is an amenable number.

678945112289 is a deficient number, since it is larger than the sum of its proper divisors (14751342751).

678945112289 is a wasteful number, since it uses less digits than its factorization.

678945112289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6368839.

The product of its digits is 17418240, while the sum is 62.

The spelling of 678945112289 in words is "six hundred seventy-eight billion, nine hundred forty-five million, one hundred twelve thousand, two hundred eighty-nine".