678125189377 has 8 divisors (see below), whose sum is σ = 698649921576. Its totient is φ = 657716090112.

The previous prime is 678125189369. The next prime is 678125189381. The reversal of 678125189377 is 773981521876.

It can be written as a sum of positive squares in 4 ways, for example, as 18332889201 + 659792300176 = 135399^2 + 812276^2 .

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 678125189377 - 2³ = 678125189369 is a prime.

It is a super-2 number, since 2×678125189377² (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 (678125189327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28896328 + ... + 28919785.

It is an arithmetic number, because the mean of its divisors is an integer number (87331240197).

Almost surely, 2^678125189377 is an apocalyptic number.

It is an amenable number.

678125189377 is a deficient number, since it is larger than the sum of its proper divisors (20524732199).

678125189377 is a wasteful number, since it uses less digits than its factorization.

678125189377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57816467.

The product of its digits is 35562240, while the sum is 64.

The spelling of 678125189377 in words is "six hundred seventy-eight billion, one hundred twenty-five million, one hundred eighty-nine thousand, three hundred seventy-seven".