685908488371 has 4 divisors (see below), whose sum is σ = 686389154472. Its totient is φ = 685427822272.

The previous prime is 685908488359. The next prime is 685908488381. The reversal of 685908488371 is 173884809586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 685908488371 - 2²³ = 685900099763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 685908488297 and 685908488306.

It is not an unprimeable number, because it can be changed into a prime (685908488351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240330910 + ... + 240333763.

It is an arithmetic number, because the mean of its divisors is an integer number (171597288618).

Almost surely, 2^685908488371 is an apocalyptic number.

685908488371 is a deficient number, since it is larger than the sum of its proper divisors (480666101).

685908488371 is a wasteful number, since it uses less digits than its factorization.

685908488371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480666100.

The product of its (nonzero) digits is 92897280, while the sum is 67.

The spelling of 685908488371 in words is "six hundred eighty-five billion, nine hundred eight million, four hundred eighty-eight thousand, three hundred seventy-one".