36859816809 has 12 divisors (see below), whose sum is σ = 53412063796. Its totient is φ = 24494700672.

The previous prime is 36859816801. The next prime is 36859816811. The reversal of 36859816809 is 90861895863.

36859816809 is a `hidden beast` number, since 36 + 8 + 598 + 1 + 6 + 8 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7208010000 + 29651806809 = 84900^2 + 172197^2 .

It is not a de Polignac number, because 36859816809 - 2³ = 36859816801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (36859816801) 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, 6539572 + ... + 6545205.

Almost surely, 2^36859816809 is an apocalyptic number.

It is an amenable number.

36859816809 is a deficient number, since it is larger than the sum of its proper divisors (16552246987).

36859816809 is a wasteful number, since it uses less digits than its factorization.

36859816809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13085096 (or 13085093 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 36859816809 in words is "thirty-six billion, eight hundred fifty-nine million, eight hundred sixteen thousand, eight hundred nine".