688750125125 has 8 divisors (see below), whose sum is σ = 859560156312. Its totient is φ = 551000100000.

The previous prime is 688750125121. The next prime is 688750125143. The reversal of 688750125125 is 521521057886.

It can be written as a sum of positive squares in 4 ways, for example, as 8062423681 + 680687701444 = 89791^2 + 825038^2 .

It is not a de Polignac number, because 688750125125 - 2² = 688750125121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688750125121) 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, 2755000376 + ... + 2755000625.

It is an arithmetic number, because the mean of its divisors is an integer number (107445019539).

Almost surely, 2^688750125125 is an apocalyptic number.

It is an amenable number.

688750125125 is a deficient number, since it is larger than the sum of its proper divisors (170810031187).

688750125125 is an equidigital number, since it uses as much as digits as its factorization.

688750125125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510001016 (or 5510001006 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 50.

The spelling of 688750125125 in words is "six hundred eighty-eight billion, seven hundred fifty million, one hundred twenty-five thousand, one hundred twenty-five".