809108489040 has 160 divisors (see below), whose sum is σ = 2591678217216. Its totient is φ = 208598077440.

The previous prime is 809108489029. The next prime is 809108489053. The reversal of 809108489040 is 40984801908.

809108489040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7632882 + ... + 7738158.

Almost surely, 2^809108489040 is an apocalyptic number.

809108489040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809108489040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295839108608).

809108489040 is an abundant number, since it is smaller than the sum of its proper divisors (1782569728176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

809108489040 is a wasteful number, since it uses less digits than its factorization.

809108489040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106357 (or 106351 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 809108489040 in words is "eight hundred nine billion, one hundred eight million, four hundred eighty-nine thousand, forty".