687506251325 has 6 divisors (see below), whose sum is σ = 852507751674. Its totient is φ = 550005001040.

The previous prime is 687506251261. The next prime is 687506251331. The reversal of 687506251325 is 523152605786.

It can be written as a sum of positive squares in 3 ways, for example, as 87906913081 + 599599338244 = 296491^2 + 774338^2 .

It is not a de Polignac number, because 687506251325 - 2⁶ = 687506251261 is a prime.

It is a super-2 number, since 2×687506251325² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 13750125002 + ... + 13750125051.

It is an arithmetic number, because the mean of its divisors is an integer number (142084625279).

Almost surely, 2^687506251325 is an apocalyptic number.

It is an amenable number.

687506251325 is a deficient number, since it is larger than the sum of its proper divisors (165001500349).

687506251325 is a wasteful number, since it uses less digits than its factorization.

687506251325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27500250063 (or 27500250058 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 687506251325 in words is "six hundred eighty-seven billion, five hundred six million, two hundred fifty-one thousand, three hundred twenty-five".