678522470869 has 8 divisors (see below), whose sum is σ = 679977355320. Its totient is φ = 677068065216.

The previous prime is 678522470803. The next prime is 678522470893. The reversal of 678522470869 is 968074225876.

It can be written as a sum of positive squares in 4 ways, for example, as 264221700625 + 414300770244 = 514025^2 + 643662^2 .

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 678522470869 - 2¹⁷ = 678522339797 is a prime.

It is a super-2 number, since 2×678522470869² (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 678522470869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678522470569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2793367 + ... + 3026539.

It is an arithmetic number, because the mean of its divisors is an integer number (84997169415).

Almost surely, 2^678522470869 is an apocalyptic number.

It is an amenable number.

678522470869 is a deficient number, since it is larger than the sum of its proper divisors (1454884451).

678522470869 is a wasteful number, since it uses less digits than its factorization.

678522470869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239399.

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 678522470869 in words is "six hundred seventy-eight billion, five hundred twenty-two million, four hundred seventy thousand, eight hundred sixty-nine".