685321731711 has 6 divisors (see below), whose sum is σ = 989909168040. Its totient is φ = 456881154468.

The previous prime is 685321731709. The next prime is 685321731761. The reversal of 685321731711 is 117137123586.

685321731711 is a `hidden beast` number, since 6 + 8 + 5 + 321 + 7 + 317 + 1 + 1 = 666.

It is not a de Polignac number, because 685321731711 - 2¹ = 685321731709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685321731761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38073429531 + ... + 38073429548.

It is an arithmetic number, because the mean of its divisors is an integer number (164984861340).

Almost surely, 2^685321731711 is an apocalyptic number.

685321731711 is a deficient number, since it is larger than the sum of its proper divisors (304587436329).

685321731711 is a wasteful number, since it uses less digits than its factorization.

685321731711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76146859085 (or 76146859082 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The spelling of 685321731711 in words is "six hundred eighty-five billion, three hundred twenty-one million, seven hundred thirty-one thousand, seven hundred eleven".