8404888867789 has 4 divisors (see below), whose sum is σ = 8899294095324. Its totient is φ = 7910483640256.

The previous prime is 8404888867783. The next prime is 8404888867861. The reversal of 8404888867789 is 9877688884048.

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 7767134893764 + 637753974025 = 2786958^2 + 798595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8404888867789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8404888867783) 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, 247202613742 + ... + 247202613775.

It is an arithmetic number, because the mean of its divisors is an integer number (2224823523831).

Almost surely, 2^{8404888867789} is an apocalyptic number.

It is an amenable number.

8404888867789 is a deficient number, since it is larger than the sum of its proper divisors (494405227535).

8404888867789 is a wasteful number, since it uses less digits than its factorization.

8404888867789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494405227534.

The product of its (nonzero) digits is 11098128384, while the sum is 85.

The spelling of 8404888867789 in words is "eight trillion, four hundred four billion, eight hundred eighty-eight million, eight hundred sixty-seven thousand, seven hundred eighty-nine".