685496015 has 16 divisors (see below), whose sum is σ = 892231200. Its totient is φ = 503546880.

The previous prime is 685495991. The next prime is 685496017. The reversal of 685496015 is 510694586.

It is not a de Polignac number, because 685496015 - 2¹⁶ = 685430479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685496017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94865 + ... + 101834.

It is an arithmetic number, because the mean of its divisors is an integer number (55764450).

Almost surely, 2^685496015 is an apocalyptic number.

685496015 is a deficient number, since it is larger than the sum of its proper divisors (206735185).

685496015 is a wasteful number, since it uses less digits than its factorization.

685496015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196762.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 685496015 is about 26181.9788213191. The cubic root of 685496015 is about 881.7287019758.

The spelling of 685496015 in words is "six hundred eighty-five million, four hundred ninety-six thousand, fifteen".