685191717350 has 48 divisors (see below), whose sum is σ = 1478261004288. Its totient is φ = 231416555040.

The previous prime is 685191717347. The next prime is 685191717361. The reversal of 685191717350 is 53717191586.

It is a junction number, because it is equal to n+sod(n) for n = 685191717292 and 685191717301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14586182 + ... + 14633081.

It is an arithmetic number, because the mean of its divisors is an integer number (30797104256).

Almost surely, 2^685191717350 is an apocalyptic number.

685191717350 is an abundant number, since it is smaller than the sum of its proper divisors (793069286938).

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

685191717350 is a wasteful number, since it uses less digits than its factorization.

685191717350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29219349 (or 29219344 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 53.

The spelling of 685191717350 in words is "six hundred eighty-five billion, one hundred ninety-one million, seven hundred seventeen thousand, three hundred fifty".