36636512221 has 8 divisors (see below), whose sum is σ = 37240500384. Its totient is φ = 36032633520.

The previous prime is 36636512153. The next prime is 36636512321. The reversal of 36636512221 is 12221563663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36636512221 - 2¹⁷ = 36636381149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36636512321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909126 + ... + 948568.

It is an arithmetic number, because the mean of its divisors is an integer number (4655062548).

Almost surely, 2^36636512221 is an apocalyptic number.

It is an amenable number.

36636512221 is a deficient number, since it is larger than the sum of its proper divisors (603988163).

36636512221 is a wasteful number, since it uses less digits than its factorization.

36636512221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54731.

The product of its digits is 77760, while the sum is 37.

The spelling of 36636512221 in words is "thirty-six billion, six hundred thirty-six million, five hundred twelve thousand, two hundred twenty-one".