685987840216 has 32 divisors (see below), whose sum is σ = 1483459956000. Its totient is φ = 291297586176.

The previous prime is 685987840201. The next prime is 685987840229. The reversal of 685987840216 is 612048789586.

It is a happy number.

685987840216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 56185561 + ... + 56197768.

It is an arithmetic number, because the mean of its divisors is an integer number (46358123625).

Almost surely, 2^685987840216 is an apocalyptic number.

It is an amenable number.

685987840216 is an abundant number, since it is smaller than the sum of its proper divisors (797472115784).

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

685987840216 is a wasteful number, since it uses less digits than its factorization.

685987840216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112383451 (or 112383447 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 685987840216 in words is "six hundred eighty-five billion, nine hundred eighty-seven million, eight hundred forty thousand, two hundred sixteen".