685379467655 has 32 divisors (see below), whose sum is σ = 849914726400. Its totient is φ = 530281458432.

The previous prime is 685379467649. The next prime is 685379467679. The reversal of 685379467655 is 556764973586.

It is a cyclic number.

It is not a de Polignac number, because 685379467655 - 2¹⁶ = 685379402119 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 37282256 + ... + 37300634.

It is an arithmetic number, because the mean of its divisors is an integer number (26559835200).

Almost surely, 2^685379467655 is an apocalyptic number.

685379467655 is a deficient number, since it is larger than the sum of its proper divisors (164535258745).

685379467655 is a wasteful number, since it uses less digits than its factorization.

685379467655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20303.

The product of its digits is 1143072000, while the sum is 71.

The spelling of 685379467655 in words is "six hundred eighty-five billion, three hundred seventy-nine million, four hundred sixty-seven thousand, six hundred fifty-five".