688504685007 has 4 divisors (see below), whose sum is σ = 918006246680. Its totient is φ = 459003123336.

The previous prime is 688504685003. The next prime is 688504685017. The reversal of 688504685007 is 700586405886.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 688504685007 - 2² = 688504685003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688504685003) 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, 114750780832 + ... + 114750780837.

It is an arithmetic number, because the mean of its divisors is an integer number (229501561670).

Almost surely, 2^688504685007 is an apocalyptic number.

688504685007 is a deficient number, since it is larger than the sum of its proper divisors (229501561673).

688504685007 is a wasteful number, since it uses less digits than its factorization.

688504685007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229501561672.

The product of its (nonzero) digits is 12902400, while the sum is 57.

The spelling of 688504685007 in words is "six hundred eighty-eight billion, five hundred four million, six hundred eighty-five thousand, seven".