686443543670 has 16 divisors (see below), whose sum is σ = 1235722007520. Its totient is φ = 274549944384.

The previous prime is 686443543661. The next prime is 686443543673. The reversal of 686443543670 is 76345344686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686443543673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3329042 + ... + 3529221.

It is an arithmetic number, because the mean of its divisors is an integer number (77232625470).

Almost surely, 2^686443543670 is an apocalyptic number.

686443543670 is a deficient number, since it is larger than the sum of its proper divisors (549278463850).

686443543670 is a wasteful number, since it uses less digits than its factorization.

686443543670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6868279.

The product of its (nonzero) digits is 34836480, while the sum is 56.

The spelling of 686443543670 in words is "six hundred eighty-six billion, four hundred forty-three million, five hundred forty-three thousand, six hundred seventy".