686078823345 has 16 divisors (see below), whose sum is σ = 1155501176640. Its totient is φ = 346650352704.

The previous prime is 686078823343. The next prime is 686078823407. The reversal of 686078823345 is 543328870686.

It is a happy number.

It is not a de Polignac number, because 686078823345 - 2¹ = 686078823343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686078823343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203646774 + ... + 1203647343.

It is an arithmetic number, because the mean of its divisors is an integer number (72218823540).

Almost surely, 2^686078823345 is an apocalyptic number.

It is an amenable number.

686078823345 is a deficient number, since it is larger than the sum of its proper divisors (469422353295).

686078823345 is a wasteful number, since it uses less digits than its factorization.

686078823345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407294144.

The product of its (nonzero) digits is 46448640, while the sum is 60.

The spelling of 686078823345 in words is "six hundred eighty-six billion, seventy-eight million, eight hundred twenty-three thousand, three hundred forty-five".