36636521221 has 8 divisors (see below), whose sum is σ = 40241488320. Its totient is φ = 33199227072.

The previous prime is 36636521219. The next prime is 36636521239. The reversal of 36636521221 is 12212563663.

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 36636521221 - 2¹ = 36636521219 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 (36636521821) 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 in 7 ways as a sum of consecutive naturals, for example, 41917780 + ... + 41918653.

It is an arithmetic number, because the mean of its divisors is an integer number (5030186040).

Almost surely, 2^36636521221 is an apocalyptic number.

It is an amenable number.

36636521221 is a deficient number, since it is larger than the sum of its proper divisors (3604967099).

36636521221 is a wasteful number, since it uses less digits than its factorization.

36636521221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83836475.

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

The spelling of 36636521221 in words is "thirty-six billion, six hundred thirty-six million, five hundred twenty-one thousand, two hundred twenty-one".