688546386485 has 4 divisors (see below), whose sum is σ = 826255663788. Its totient is φ = 550837109184.

The previous prime is 688546386439. The next prime is 688546386491. The reversal of 688546386485 is 584683645886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 384556255876 + 303990130609 = 620126^2 + 551353^2 .

It is a cyclic number.

It is not a de Polignac number, because 688546386485 - 2²⁶ = 688479277621 is a prime.

It is a super-2 number, since 2×688546386485² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68854638644 + ... + 68854638653.

It is an arithmetic number, because the mean of its divisors is an integer number (206563915947).

Almost surely, 2^688546386485 is an apocalyptic number.

It is an amenable number.

688546386485 is a deficient number, since it is larger than the sum of its proper divisors (137709277303).

688546386485 is a wasteful number, since it uses less digits than its factorization.

688546386485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137709277302.

The product of its digits is 1061683200, while the sum is 71.

The spelling of 688546386485 in words is "six hundred eighty-eight billion, five hundred forty-six million, three hundred eighty-six thousand, four hundred eighty-five".