688352171907 has 4 divisors (see below), whose sum is σ = 917802895880. Its totient is φ = 458901447936.

The previous prime is 688352171891. The next prime is 688352171953. The reversal of 688352171907 is 709171253886.

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 688352171907 - 2⁴ = 688352171891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688352171107) 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, 114725361982 + ... + 114725361987.

It is an arithmetic number, because the mean of its divisors is an integer number (229450723970).

Almost surely, 2^688352171907 is an apocalyptic number.

688352171907 is a deficient number, since it is larger than the sum of its proper divisors (229450723973).

688352171907 is a wasteful number, since it uses less digits than its factorization.

688352171907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229450723972.

The product of its (nonzero) digits is 5080320, while the sum is 57.

The spelling of 688352171907 in words is "six hundred eighty-eight billion, three hundred fifty-two million, one hundred seventy-one thousand, nine hundred seven".