36155855808 has 168 divisors, whose sum is σ = 107502368688. Its totient is φ = 11609837568.

The previous prime is 36155855803. The next prime is 36155855809. The reversal of 36155855808 is 80855855163.

It is a happy number.

36155855808 is a `hidden beast` number, since 3 + 6 + 1 + 5 + 58 + 5 + 580 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36155855803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1798066 + ... + 1818062.

Almost surely, 2^36155855808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36155855808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53751184344).

36155855808 is an abundant number, since it is smaller than the sum of its proper divisors (71346512880).

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

36155855808 is a wasteful number, since it uses less digits than its factorization.

36155855808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20131 (or 20118 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 54.

The spelling of 36155855808 in words is "thirty-six billion, one hundred fifty-five million, eight hundred fifty-five thousand, eight hundred eight".