689853538512 has 100 divisors (see below), whose sum is σ = 2061044025216. Its totient is φ = 222533386560.

The previous prime is 689853538511. The next prime is 689853538597. The reversal of 689853538512 is 215835358986.

689853538512 is a `hidden beast` number, since 6 + 8 + 9 + 8 + 535 + 3 + 85 + 12 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 689853538512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689853538511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8545218 + ... + 8625569.

Almost surely, 2^689853538512 is an apocalyptic number.

689853538512 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

689853538512 is an abundant number, since it is smaller than the sum of its proper divisors (1371190486704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689853538512 is a wasteful number, since it uses less digits than its factorization.

689853538512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17170838 (or 17170823 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 63.

The spelling of 689853538512 in words is "six hundred eighty-nine billion, eight hundred fifty-three million, five hundred thirty-eight thousand, five hundred twelve".