686109426530535 has 96 divisors (see below), whose sum is σ = 1388084575887360. Its totient is φ = 306972994869504.

The previous prime is 686109426530513. The next prime is 686109426530551. The reversal of 686109426530535 is 535035624901686.

It is a happy number.

686109426530535 is a `hidden beast` number, since 6 + 8 + 6 + 1 + 0 + 9 + 4 + 2 + 65 + 30 + 535 = 666.

It is not a de Polignac number, because 686109426530535 - 2¹⁸ = 686109426268391 is a prime.

It is a super-2 number, since 2×686109426530535² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1550943106 + ... + 1551385424.

It is an arithmetic number, because the mean of its divisors is an integer number (14459214332160).

Almost surely, 2^{686109426530535} is an apocalyptic number.

686109426530535 is an abundant number, since it is smaller than the sum of its proper divisors (701975149356825).

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

686109426530535 is a wasteful number, since it uses less digits than its factorization.

686109426530535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547157 (or 547154 counting only the distinct ones).

The product of its (nonzero) digits is 139968000, while the sum is 63.

The spelling of 686109426530535 in words is "six hundred eighty-six trillion, one hundred nine billion, four hundred twenty-six million, five hundred thirty thousand, five hundred thirty-five".