687563131250 has 24 divisors (see below), whose sum is σ = 1289098375236. Its totient is φ = 275025250000.

The previous prime is 687563131231. The next prime is 687563131259. The reversal of 687563131250 is 52131365786.

It can be written as a sum of positive squares in 6 ways, for example, as 280528063201 + 407035068049 = 529649^2 + 637993^2 .

It is a junction number, because it is equal to n+sod(n) for n = 687563131195 and 687563131204.

It is not an unprimeable number, because it can be changed into a prime (687563131259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54998801 + ... + 55011300.

Almost surely, 2^687563131250 is an apocalyptic number.

687563131250 is a deficient number, since it is larger than the sum of its proper divisors (601535243986).

687563131250 is an equidigital number, since it uses as much as digits as its factorization.

687563131250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110010128 (or 110010108 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 687563131250 in words is "six hundred eighty-seven billion, five hundred sixty-three million, one hundred thirty-one thousand, two hundred fifty".