687185920104 has 16 divisors (see below), whose sum is σ = 1717964800320. Its totient is φ = 229061973360.

The previous prime is 687185920103. The next prime is 687185920121. The reversal of 687185920104 is 401029581786.

It is not an unprimeable number, because it can be changed into a prime (687185920103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14316373312 + ... + 14316373359.

It is an arithmetic number, because the mean of its divisors is an integer number (107372800020).

Almost surely, 2^687185920104 is an apocalyptic number.

It is an amenable number.

687185920104 is an abundant number, since it is smaller than the sum of its proper divisors (1030778880216).

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

687185920104 is a wasteful number, since it uses less digits than its factorization.

687185920104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28632746680 (or 28632746676 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 687185920104 in words is "six hundred eighty-seven billion, one hundred eighty-five million, nine hundred twenty thousand, one hundred four".