8409809476 has 24 divisors (see below), whose sum is σ = 15120264600. Its totient is φ = 4089814272.

The previous prime is 8409809461. The next prime is 8409809477. The reversal of 8409809476 is 6749089048.

It can be written as a sum of positive squares in 4 ways, for example, as 6217322500 + 2192486976 = 78850^2 + 46824^2 .

It is not an unprimeable number, because it can be changed into a prime (8409809477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496800 + ... + 513448.

It is an arithmetic number, because the mean of its divisors is an integer number (630011025).

Almost surely, 2^8409809476 is an apocalyptic number.

It is an amenable number.

8409809476 is a deficient number, since it is larger than the sum of its proper divisors (6710455124).

8409809476 is a wasteful number, since it uses less digits than its factorization.

8409809476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20103 (or 20101 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 8409809476 is about 91705.0133635016. The cubic root of 8409809476 is about 2033.5837007004.

The spelling of 8409809476 in words is "eight billion, four hundred nine million, eight hundred nine thousand, four hundred seventy-six".