909745680889 has 16 divisors (see below), whose sum is σ = 969942502800. Its totient is φ = 850297503744.

The previous prime is 909745680869. The next prime is 909745680929. The reversal of 909745680889 is 988086547909.

It can be written as a sum of positive squares in 8 ways, for example, as 29076047289 + 880669633600 = 170517^2 + 938440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-909745680889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (909745680869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4679577 + ... + 4870105.

It is an arithmetic number, because the mean of its divisors is an integer number (60621406425).

Almost surely, 2^909745680889 is an apocalyptic number.

It is an amenable number.

909745680889 is a deficient number, since it is larger than the sum of its proper divisors (60196821911).

909745680889 is a wasteful number, since it uses less digits than its factorization.

909745680889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192492.

The product of its (nonzero) digits is 313528320, while the sum is 73.

The spelling of 909745680889 in words is "nine hundred nine billion, seven hundred forty-five million, six hundred eighty thousand, eight hundred eighty-nine".