685049618 has 32 divisors (see below), whose sum is σ = 1180179072. Its totient is φ = 295187200.

The previous prime is 685049587. The next prime is 685049621. The reversal of 685049618 is 816940586.

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, 51188 + ... + 63168.

It is an arithmetic number, because the mean of its divisors is an integer number (36880596).

Almost surely, 2^685049618 is an apocalyptic number.

685049618 is a deficient number, since it is larger than the sum of its proper divisors (495129454).

685049618 is a wasteful number, since it uses less digits than its factorization.

685049618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12130.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 685049618 is about 26173.4525426051. The cubic root of 685049618 is about 881.5372656495.

The spelling of 685049618 in words is "six hundred eighty-five million, forty-nine thousand, six hundred eighteen".