687565164 has 48 divisors (see below), whose sum is σ = 1884798720. Its totient is φ = 192325440.

The previous prime is 687565163. The next prime is 687565169. The reversal of 687565164 is 461565786.

It is not an unprimeable number, because it can be changed into a prime (687565163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198624 + ... + 202055.

It is an arithmetic number, because the mean of its divisors is an integer number (39266640).

Almost surely, 2^687565164 is an apocalyptic number.

It is an amenable number.

687565164 is an abundant number, since it is smaller than the sum of its proper divisors (1197233556).

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

687565164 is a wasteful number, since it uses less digits than its factorization.

687565164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400710 (or 400708 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The square root of 687565164 is about 26221.4638035332. The cubic root of 687565164 is about 882.6149679953.

It can be divided in two parts, 68756 and 5164, that added together give a triangular number (73920 = T₃₈₄).

The spelling of 687565164 in words is "six hundred eighty-seven million, five hundred sixty-five thousand, one hundred sixty-four".