687100108728 has 64 divisors (see below), whose sum is σ = 1917488707200. Its totient is φ = 203370007680.

The previous prime is 687100108699. The next prime is 687100108789. The reversal of 687100108728 is 827801001786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30252043 + ... + 30274746.

It is an arithmetic number, because the mean of its divisors is an integer number (29960761050).

Almost surely, 2^687100108728 is an apocalyptic number.

It is an amenable number.

687100108728 is an abundant number, since it is smaller than the sum of its proper divisors (1230388598472).

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

687100108728 is a wasteful number, since it uses less digits than its factorization.

687100108728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60526852 (or 60526848 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 48.

The spelling of 687100108728 in words is "six hundred eighty-seven billion, one hundred million, one hundred eight thousand, seven hundred twenty-eight".