685577775586 has 16 divisors (see below), whose sum is σ = 1134459652320. Its totient is φ = 308124842080.

The previous prime is 685577775551. The next prime is 685577775587.

It is a happy number.

685577775586 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (685577775587) 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, 175068976 + ... + 175072891.

It is an arithmetic number, because the mean of its divisors is an integer number (70903728270).

Almost surely, 2^685577775586 is an apocalyptic number.

685577775586 is a deficient number, since it is larger than the sum of its proper divisors (448881876734).

685577775586 is a wasteful number, since it uses less digits than its factorization.

685577775586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350141969.

The product of its digits is 3457440000, while the sum is 76.

The spelling of 685577775586 in words is "six hundred eighty-five billion, five hundred seventy-seven million, seven hundred seventy-five thousand, five hundred eighty-six".