36840579221 has 2 divisors, whose sum is σ = 36840579222. Its totient is φ = 36840579220.

The previous prime is 36840579179. The next prime is 36840579239. The reversal of 36840579221 is 12297504863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29019122500 + 7821456721 = 170350^2 + 88439^2 .

It is a cyclic number.

It is not a de Polignac number, because 36840579221 - 2⁶ = 36840579157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36840579241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18420289610 + 18420289611.

It is an arithmetic number, because the mean of its divisors is an integer number (18420289611).

It is a 1-persistent number, because it is pandigital, but 2⋅36840579221 = 73681158442 is not.

Almost surely, 2^36840579221 is an apocalyptic number.

It is an amenable number.

36840579221 is a deficient number, since it is larger than the sum of its proper divisors (1).

36840579221 is an equidigital number, since it uses as much as digits as its factorization.

36840579221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 36840579221 in words is "thirty-six billion, eight hundred forty million, five hundred seventy-nine thousand, two hundred twenty-one".