809785005425 has 24 divisors (see below), whose sum is σ = 1106711270112. Its totient is φ = 582863040000.

The previous prime is 809785005413. The next prime is 809785005439. The reversal of 809785005425 is 524500587908.

It is not a de Polignac number, because 809785005425 - 2²⁸ = 809516569969 is a prime.

It is a super-2 number, since 2×809785005425² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15152051 + ... + 15205400.

It is an arithmetic number, because the mean of its divisors is an integer number (46112969588).

Almost surely, 2^809785005425 is an apocalyptic number.

It is an amenable number.

809785005425 is a deficient number, since it is larger than the sum of its proper divisors (296926264687).

809785005425 is a wasteful number, since it uses less digits than its factorization.

809785005425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30357569 (or 30357564 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 53.

The spelling of 809785005425 in words is "eight hundred nine billion, seven hundred eighty-five million, five thousand, four hundred twenty-five".