686467838738 has 64 divisors (see below), whose sum is σ = 1161787898880. Its totient is φ = 301493606400.

The previous prime is 686467838737. The next prime is 686467838857. The reversal of 686467838738 is 837838764686.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (686467838737) 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 31 ways as a sum of consecutive naturals, for example, 252469343 + ... + 252472061.

It is an arithmetic number, because the mean of its divisors is an integer number (18152935920).

Almost surely, 2^686467838738 is an apocalyptic number.

686467838738 is a deficient number, since it is larger than the sum of its proper divisors (475320060142).

686467838738 is a wasteful number, since it uses less digits than its factorization.

686467838738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363.

The product of its digits is 1560674304, while the sum is 74.

The spelling of 686467838738 in words is "six hundred eighty-six billion, four hundred sixty-seven million, eight hundred thirty-eight thousand, seven hundred thirty-eight".