809380837980 has 144 divisors (see below), whose sum is σ = 2884339077984. Its totient is φ = 181120181760.

The previous prime is 809380837973. The next prime is 809380837981. The reversal of 809380837980 is 89738083908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809380837981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15696499 + ... + 15747978.

It is an arithmetic number, because the mean of its divisors is an integer number (20030132486).

Almost surely, 2^809380837980 is an apocalyptic number.

It is an amenable number.

809380837980 is an abundant number, since it is smaller than the sum of its proper divisors (2074958240004).

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

809380837980 is a wasteful number, since it uses less digits than its factorization.

809380837980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31444516 (or 31444511 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 809380837980 in words is "eight hundred nine billion, three hundred eighty million, eight hundred thirty-seven thousand, nine hundred eighty".