685675551687 has 8 divisors (see below), whose sum is σ = 1044838935936. Its totient is φ = 391814600952.

The previous prime is 685675551683. The next prime is 685675551697. The reversal of 685675551687 is 786155576586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685675551687 - 2² = 685675551683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685675551683) 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, 16325608353 + ... + 16325608394.

It is an arithmetic number, because the mean of its divisors is an integer number (130604866992).

Almost surely, 2^685675551687 is an apocalyptic number.

685675551687 is a deficient number, since it is larger than the sum of its proper divisors (359163384249).

685675551687 is a wasteful number, since it uses less digits than its factorization.

685675551687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32651216757.

The product of its digits is 423360000, while the sum is 69.

The spelling of 685675551687 in words is "six hundred eighty-five billion, six hundred seventy-five million, five hundred fifty-one thousand, six hundred eighty-seven".