687315305980 has 24 divisors (see below), whose sum is σ = 1443407772240. Its totient is φ = 274917431040.

The previous prime is 687315305977. The next prime is 687315306037. The reversal of 687315305980 is 89503513786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125316 + ... + 1179124.

It is an arithmetic number, because the mean of its divisors is an integer number (60141990510).

Almost surely, 2^687315305980 is an apocalyptic number.

It is an amenable number.

687315305980 is an abundant number, since it is smaller than the sum of its proper divisors (756092466260).

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

687315305980 is a wasteful number, since it uses less digits than its factorization.

687315305980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086429 (or 1086427 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 687315305980 in words is "six hundred eighty-seven billion, three hundred fifteen million, three hundred five thousand, nine hundred eighty".