678914989169 has 8 divisors (see below), whose sum is σ = 715462251840. Its totient is φ = 642449216016.

The previous prime is 678914989121. The next prime is 678914989177. The reversal of 678914989169 is 961989419876.

678914989169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678914989169 is a prime.

It is a super-2 number, since 2×678914989169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 678914989169.

It is not an unprimeable number, because it can be changed into a prime (678914989469) 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, 20355269 + ... + 20388594.

It is an arithmetic number, because the mean of its divisors is an integer number (89432781480).

Almost surely, 2^678914989169 is an apocalyptic number.

It is an amenable number.

678914989169 is a deficient number, since it is larger than the sum of its proper divisors (36547262671).

678914989169 is a wasteful number, since it uses less digits than its factorization.

678914989169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40744759.

The product of its digits is 423263232, while the sum is 77.

The spelling of 678914989169 in words is "six hundred seventy-eight billion, nine hundred fourteen million, nine hundred eighty-nine thousand, one hundred sixty-nine".