686352518389 has 64 divisors (see below), whose sum is σ = 763168739328. Its totient is φ = 615250944000.

The previous prime is 686352518321. The next prime is 686352518471. The reversal of 686352518389 is 983815253686.

It is a cyclic number.

It is not a de Polignac number, because 686352518389 - 2⁷ = 686352518261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686352518389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686352512389) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 720201537 + ... + 720202489.

It is an arithmetic number, because the mean of its divisors is an integer number (11924511552).

Almost surely, 2^686352518389 is an apocalyptic number.

It is an amenable number.

686352518389 is a deficient number, since it is larger than the sum of its proper divisors (76816220939).

686352518389 is a wasteful number, since it uses less digits than its factorization.

686352518389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318.

The product of its digits is 74649600, while the sum is 64.

The spelling of 686352518389 in words is "six hundred eighty-six billion, three hundred fifty-two million, five hundred eighteen thousand, three hundred eighty-nine".