687800478258 has 48 divisors (see below), whose sum is σ = 1499852124576. Its totient is φ = 227791294080.

The previous prime is 687800478251. The next prime is 687800478289. The reversal of 687800478258 is 852874008786.

687800478258 is a `hidden beast` number, since 6 + 87 + 80 + 0 + 478 + 2 + 5 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 687800478195 and 687800478204.

It is not an unprimeable number, because it can be changed into a prime (687800478251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1834810 + ... + 2177642.

It is an arithmetic number, because the mean of its divisors is an integer number (31246919262).

Almost surely, 2^687800478258 is an apocalyptic number.

687800478258 is an abundant number, since it is smaller than the sum of its proper divisors (812051646318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687800478258 is a wasteful number, since it uses less digits than its factorization.

687800478258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343559 (or 343556 counting only the distinct ones).

The product of its (nonzero) digits is 48168960, while the sum is 63.

The spelling of 687800478258 in words is "six hundred eighty-seven billion, eight hundred million, four hundred seventy-eight thousand, two hundred fifty-eight".