686874134076 has 48 divisors (see below), whose sum is σ = 1827520327584. Its totient is φ = 198913775616.

The previous prime is 686874134057. The next prime is 686874134077. The reversal of 686874134076 is 670431478686.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686874134077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129498505 + ... + 129503808.

It is an arithmetic number, because the mean of its divisors is an integer number (38073340158).

Almost surely, 2^686874134076 is an apocalyptic number.

It is an amenable number.

686874134076 is an abundant number, since it is smaller than the sum of its proper divisors (1140646193508).

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

686874134076 is a wasteful number, since it uses less digits than its factorization.

686874134076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259002350 (or 259002348 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 60.

The spelling of 686874134076 in words is "six hundred eighty-six billion, eight hundred seventy-four million, one hundred thirty-four thousand, seventy-six".