688169164 has 6 divisors (see below), whose sum is σ = 1204296044. Its totient is φ = 344084580.

The previous prime is 688169149. The next prime is 688169239. The reversal of 688169164 is 461961886.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86021142 + ... + 86021149.

Almost surely, 2^688169164 is an apocalyptic number.

It is an amenable number.

688169164 is a deficient number, since it is larger than the sum of its proper divisors (516126880).

688169164 is a wasteful number, since it uses less digits than its factorization.

688169164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172042295 (or 172042293 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 688169164 is about 26232.9785575333. The cubic root of 688169164 is about 882.8733403126.

The spelling of 688169164 in words is "six hundred eighty-eight million, one hundred sixty-nine thousand, one hundred sixty-four".