85809784049 has 12 divisors (see below), whose sum is σ = 94336336080. Its totient is φ = 77995255800.

The previous prime is 85809784013. The next prime is 85809784129. The reversal of 85809784049 is 94048790858.

It is not a de Polignac number, because 85809784049 - 2³² = 81514816753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85809783982 and 85809784000.

It is not an unprimeable number, because it can be changed into a prime (85809714049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 668342 + ... + 786320.

It is an arithmetic number, because the mean of its divisors is an integer number (7861361340).

Almost surely, 2^85809784049 is an apocalyptic number.

It is an amenable number.

85809784049 is a deficient number, since it is larger than the sum of its proper divisors (8526552031).

85809784049 is a wasteful number, since it uses less digits than its factorization.

85809784049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124012 (or 124001 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 62.

The spelling of 85809784049 in words is "eighty-five billion, eight hundred nine million, seven hundred eighty-four thousand, forty-nine".