687787599012 has 12 divisors (see below), whose sum is σ = 1604837731056. Its totient is φ = 229262533000.

The previous prime is 687787599007. The next prime is 687787599077. The reversal of 687787599012 is 210995787786.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×687787599012² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28657816614 + ... + 28657816637.

It is an arithmetic number, because the mean of its divisors is an integer number (133736477588).

Almost surely, 2^687787599012 is an apocalyptic number.

It is an amenable number.

687787599012 is an abundant number, since it is smaller than the sum of its proper divisors (917050132044).

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

687787599012 is a wasteful number, since it uses less digits than its factorization.

687787599012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57315633258 (or 57315633256 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 69.

The spelling of 687787599012 in words is "six hundred eighty-seven billion, seven hundred eighty-seven million, five hundred ninety-nine thousand, twelve".