685715718 has 16 divisors (see below), whose sum is σ = 1390219056. Its totient is φ = 225440640.

The previous prime is 685715717. The next prime is 685715729. The reversal of 685715718 is 817517586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685715717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782343 + ... + 783218.

It is an arithmetic number, because the mean of its divisors is an integer number (86888691).

Almost surely, 2^685715718 is an apocalyptic number.

685715718 is an abundant number, since it is smaller than the sum of its proper divisors (704503338).

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

685715718 is a wasteful number, since it uses less digits than its factorization.

685715718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565639.

The product of its digits is 470400, while the sum is 48.

The square root of 685715718 is about 26186.1741764619. The cubic root of 685715718 is about 881.8228905851.

The spelling of 685715718 in words is "six hundred eighty-five million, seven hundred fifteen thousand, seven hundred eighteen".