9894503675809 has 3 divisors (see below), whose sum is σ = 9894506821363. Its totient is φ = 9894500530256.

The previous prime is 9894503675789. The next prime is 9894503675831. The reversal of 9894503675809 is 9085763054989.

The square root of 9894503675809 is 3145553.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4786578230625 + 5107925445184 = 2187825^2 + 2260072^2 .

It is not a de Polignac number, because 9894503675809 - 2⁹ = 9894503675297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9894503675209) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1572777 + ... + 4718329.

Almost surely, 2^{9894503675809} is an apocalyptic number.

9894503675809 is the 3145553-rd square number.

9894503675809 is the 1572777-th centered octagonal number.

It is an amenable number.

9894503675809 is a deficient number, since it is larger than the sum of its proper divisors (3145554).

9894503675809 is an frugal number, since it uses more digits than its factorization.

9894503675809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6291106 (or 3145553 counting only the distinct ones).

The product of its (nonzero) digits is 587865600, while the sum is 73.

The spelling of 9894503675809 in words is "nine trillion, eight hundred ninety-four billion, five hundred three million, six hundred seventy-five thousand, eight hundred nine".