686026340320 has 24 divisors (see below), whose sum is σ = 1620737229384. Its totient is φ = 274410536064.

The previous prime is 686026340309. The next prime is 686026340323. The reversal of 686026340320 is 23043620686.

It is a super-2 number, since 2×686026340320² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent 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, 2143832154 + ... + 2143832473.

It is an arithmetic number, because the mean of its divisors is an integer number (67530717891).

Almost surely, 2^686026340320 is an apocalyptic number.

It is an amenable number.

686026340320 is an abundant number, since it is smaller than the sum of its proper divisors (934710889064).

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

686026340320 is a wasteful number, since it uses less digits than its factorization.

686026340320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287664642 (or 4287664634 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 686026340320 in words is "six hundred eighty-six billion, twenty-six million, three hundred forty thousand, three hundred twenty".