687551079168 has 90 divisors (see below), whose sum is σ = 2050152973484. Its totient is φ = 229183686144.

The previous prime is 687551079113. The next prime is 687551079199. The reversal of 687551079168 is 861970155786.

687551079168 is a `hidden beast` number, since 6 + 8 + 7 + 551 + 0 + 79 + 1 + 6 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16557946 + ... + 16599417.

Almost surely, 2^687551079168 is an apocalyptic number.

It is an amenable number.

687551079168 is an abundant number, since it is smaller than the sum of its proper divisors (1362601894316).

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

687551079168 is an equidigital number, since it uses as much as digits as its factorization.

687551079168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33157391 (or 33157368 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 63.

The spelling of 687551079168 in words is "six hundred eighty-seven billion, five hundred fifty-one million, seventy-nine thousand, one hundred sixty-eight".