685716718020 has 96 divisors (see below), whose sum is σ = 2038945668480. Its totient is φ = 171700623360.

The previous prime is 685716718019. The next prime is 685716718021. The reversal of 685716718020 is 20817617586.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (685716718019) and next prime (685716718021).

It is not an unprimeable number, because it can be changed into a prime (685716718021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2532711 + ... + 2790350.

It is an arithmetic number, because the mean of its divisors is an integer number (21239017380).

Almost surely, 2^685716718020 is an apocalyptic number.

685716718020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685716718020 is an abundant number, since it is smaller than the sum of its proper divisors (1353228950460).

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

685716718020 is a wasteful number, since it uses less digits than its factorization.

685716718020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5323205 (or 5323203 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 685716718020 in words is "six hundred eighty-five billion, seven hundred sixteen million, seven hundred eighteen thousand, twenty".