678898639069 has 32 divisors (see below), whose sum is σ = 814510161920. Its totient is φ = 553659753600.

The previous prime is 678898639063. The next prime is 678898639087. The reversal of 678898639069 is 960936898876.

It is a cyclic number.

It is not a de Polignac number, because 678898639069 - 2⁹ = 678898638557 is a prime.

It is a super-2 number, since 2×678898639069² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678898639069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678898639063) 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 31 ways as a sum of consecutive naturals, for example, 2997529 + ... + 3216049.

It is an arithmetic number, because the mean of its divisors is an integer number (25453442560).

Almost surely, 2^678898639069 is an apocalyptic number.

It is an amenable number.

678898639069 is a deficient number, since it is larger than the sum of its proper divisors (135611522851).

678898639069 is a wasteful number, since it uses less digits than its factorization.

678898639069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218801.

The product of its (nonzero) digits is 1693052928, while the sum is 79.

The spelling of 678898639069 in words is "six hundred seventy-eight billion, eight hundred ninety-eight million, six hundred thirty-nine thousand, sixty-nine".