685758857587 has 8 divisors (see below), whose sum is σ = 701877608960. Its totient is φ = 669647873160.

The previous prime is 685758857573. The next prime is 685758857591. The reversal of 685758857587 is 785758857586.

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

It is a cyclic number.

It is not a de Polignac number, because 685758857587 - 2³⁵ = 651399119219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685758857507) 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, 1762887 + ... + 2116432.

It is an arithmetic number, because the mean of its divisors is an integer number (87734701120).

Almost surely, 2^685758857587 is an apocalyptic number.

685758857587 is a deficient number, since it is larger than the sum of its proper divisors (16118751373).

685758857587 is a wasteful number, since it uses less digits than its factorization.

685758857587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883473.

The product of its digits is 5268480000, while the sum is 79.

Subtracting 685758857587 from its reverse (785758857586), we obtain a palindrome (99999999999).

The spelling of 685758857587 in words is "six hundred eighty-five billion, seven hundred fifty-eight million, eight hundred fifty-seven thousand, five hundred eighty-seven".