686770142720 has 80 divisors (see below), whose sum is σ = 1646874356688. Its totient is φ = 274668748800.

The previous prime is 686770142719. The next prime is 686770142789. The reversal of 686770142720 is 27241077686.

686770142720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23504120 + ... + 23533320.

Almost surely, 2^686770142720 is an apocalyptic number.

It is an amenable number.

686770142720 is an abundant number, since it is smaller than the sum of its proper divisors (960104213968).

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

686770142720 is an equidigital number, since it uses as much as digits as its factorization.

686770142720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38411 (or 38395 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 686770142720 in words is "six hundred eighty-six billion, seven hundred seventy million, one hundred forty-two thousand, seven hundred twenty".