686740739468 has 18 divisors (see below), whose sum is σ = 1398007934316. Its totient is φ = 294317459688.

The previous prime is 686740739459. The next prime is 686740739521. The reversal of 686740739468 is 864937047686.

686740739468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×686740739468² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 686740739398 and 686740739407.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1751889446 + ... + 1751889837.

It is an arithmetic number, because the mean of its divisors is an integer number (77667107462).

Almost surely, 2^686740739468 is an apocalyptic number.

It is an amenable number.

686740739468 is an abundant number, since it is smaller than the sum of its proper divisors (711267194848).

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

686740739468 is a wasteful number, since it uses less digits than its factorization.

686740739468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503779301 (or 3503779292 counting only the distinct ones).

The product of its (nonzero) digits is 292626432, while the sum is 68.

The spelling of 686740739468 in words is "six hundred eighty-six billion, seven hundred forty million, seven hundred thirty-nine thousand, four hundred sixty-eight".