8749310051809 has 4 divisors (see below), whose sum is σ = 8749332654340. Its totient is φ = 8749287449280.

The previous prime is 8749310051789. The next prime is 8749310051821. The reversal of 8749310051809 is 9081500139478.

It is a happy number.

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 5992704000000 + 2756606051809 = 2448000^2 + 1660303^2 .

It is a cyclic number.

It is not a de Polignac number, because 8749310051809 - 2²¹ = 8749307954657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8749310051809.

It is not an unprimeable number, because it can be changed into a prime (8749310051869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10710324 + ... + 11498245.

It is an arithmetic number, because the mean of its divisors is an integer number (2187333163585).

Almost surely, 2^{8749310051809} is an apocalyptic number.

It is an amenable number.

8749310051809 is a deficient number, since it is larger than the sum of its proper divisors (22602531).

8749310051809 is a wasteful number, since it uses less digits than its factorization.

8749310051809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22602530.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 8749310051809 in words is "eight trillion, seven hundred forty-nine billion, three hundred ten million, fifty-one thousand, eight hundred nine".