685007779474 has 16 divisors (see below), whose sum is σ = 1042419611520. Its totient is φ = 337538612320.

The previous prime is 685007779457. The next prime is 685007779493. The reversal of 685007779474 is 474977700586.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668134 + ... + 1347745.

It is an arithmetic number, because the mean of its divisors is an integer number (65151225720).

Almost surely, 2^685007779474 is an apocalyptic number.

685007779474 is a deficient number, since it is larger than the sum of its proper divisors (357411832046).

685007779474 is a wasteful number, since it uses less digits than its factorization.

685007779474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018345.

The product of its (nonzero) digits is 82978560, while the sum is 64.

The spelling of 685007779474 in words is "six hundred eighty-five billion, seven million, seven hundred seventy-nine thousand, four hundred seventy-four".