685416515 has 16 divisors (see below), whose sum is σ = 942317760. Its totient is φ = 468840960.

The previous prime is 685416503. The next prime is 685416521. The reversal of 685416515 is 515614586.

It is not a de Polignac number, because 685416515 - 2²⁰ = 684367939 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9626 + ... + 38255.

It is an arithmetic number, because the mean of its divisors is an integer number (58894860).

Almost surely, 2^685416515 is an apocalyptic number.

685416515 is a deficient number, since it is larger than the sum of its proper divisors (256901245).

685416515 is a wasteful number, since it uses less digits than its factorization.

685416515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48302.

The product of its digits is 144000, while the sum is 41.

The square root of 685416515 is about 26180.4605574463. The cubic root of 685416515 is about 881.6946146676.

The spelling of 685416515 in words is "six hundred eighty-five million, four hundred sixteen thousand, five hundred fifteen".