686026340321 has 4 divisors (see below), whose sum is σ = 784030103232. Its totient is φ = 588022577412.

The previous prime is 686026340309. The next prime is 686026340323. The reversal of 686026340321 is 123043620686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 686026340321 - 2⁶ = 686026340257 is a prime.

It is a super-2 number, since 2×686026340321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686026340323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49001881445 + ... + 49001881458.

It is an arithmetic number, because the mean of its divisors is an integer number (196007525808).

Almost surely, 2^686026340321 is an apocalyptic number.

It is an amenable number.

686026340321 is a deficient number, since it is larger than the sum of its proper divisors (98003762911).

686026340321 is an equidigital number, since it uses as much as digits as its factorization.

686026340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98003762910.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 686026340321 in words is "six hundred eighty-six billion, twenty-six million, three hundred forty thousand, three hundred twenty-one".