36155855809 has 2 divisors, whose sum is σ = 36155855810. Its totient is φ = 36155855808.

The previous prime is 36155855803. The next prime is 36155855849. The reversal of 36155855809 is 90855855163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35890165809 + 265690000 = 189447^2 + 16300^2 .

It is a cyclic number.

It is not a de Polignac number, because 36155855809 - 2¹³ = 36155847617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36155855809.

It is not a weakly prime, because it can be changed into another prime (36155855803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18077927904 + 18077927905.

It is an arithmetic number, because the mean of its divisors is an integer number (18077927905).

Almost surely, 2^36155855809 is an apocalyptic number.

It is an amenable number.

36155855809 is a deficient number, since it is larger than the sum of its proper divisors (1).

36155855809 is an equidigital number, since it uses as much as digits as its factorization.

36155855809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480000, while the sum is 55.

The spelling of 36155855809 in words is "thirty-six billion, one hundred fifty-five million, eight hundred fifty-five thousand, eight hundred nine".