689895137759 has 8 divisors (see below), whose sum is σ = 733076772768. Its totient is φ = 647002343680.

The previous prime is 689895137749. The next prime is 689895137773. The reversal of 689895137759 is 957731598986.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689895137759 is a prime.

It is a super-2 number, since 2×689895137759² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 689895137759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689895137719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72205307 + ... + 72214860.

It is an arithmetic number, because the mean of its divisors is an integer number (91634596596).

Almost surely, 2^689895137759 is an apocalyptic number.

689895137759 is a deficient number, since it is larger than the sum of its proper divisors (43181635009).

689895137759 is a wasteful number, since it uses less digits than its factorization.

689895137759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144420465.

The product of its digits is 1028764800, while the sum is 77.

The spelling of 689895137759 in words is "six hundred eighty-nine billion, eight hundred ninety-five million, one hundred thirty-seven thousand, seven hundred fifty-nine".