688569136 has 10 divisors (see below), whose sum is σ = 1334102732. Its totient is φ = 344284560.

The previous prime is 688569121. The next prime is 688569137. The reversal of 688569136 is 631965886.

It is not an unprimeable number, because it can be changed into a prime (688569137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21517770 + ... + 21517801.

Almost surely, 2^688569136 is an apocalyptic number.

It is an amenable number.

688569136 is a deficient number, since it is larger than the sum of its proper divisors (645533596).

688569136 is a wasteful number, since it uses less digits than its factorization.

688569136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43035579 (or 43035573 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The square root of 688569136 is about 26240.6009077536. The cubic root of 688569136 is about 883.0443526367.

The spelling of 688569136 in words is "six hundred eighty-eight million, five hundred sixty-nine thousand, one hundred thirty-six".