686936564 has 24 divisors (see below), whose sum is σ = 1306233600. Its totient is φ = 314893440.

The previous prime is 686936563. The next prime is 686936581. The reversal of 686936564 is 465639686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686936563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143429 + ... + 148140.

It is an arithmetic number, because the mean of its divisors is an integer number (54426400).

Almost surely, 2^686936564 is an apocalyptic number.

It is an amenable number.

686936564 is a deficient number, since it is larger than the sum of its proper divisors (619297036).

686936564 is a wasteful number, since it uses less digits than its factorization.

686936564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291623 (or 291621 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 53.

The square root of 686936564 is about 26209.4746990473. The cubic root of 686936564 is about 882.3459118335.

It can be divided in two parts, 68693 and 6564, that added together give a palindrome (75257).

The spelling of 686936564 in words is "six hundred eighty-six million, nine hundred thirty-six thousand, five hundred sixty-four".