3636929471821 has 8 divisors (see below), whose sum is σ = 3638480227200. Its totient is φ = 3635378969280.

The previous prime is 3636929471807. The next prime is 3636929471839. The reversal of 3636929471821 is 1281749296363.

It is a happy number.

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 3636929471821 - 2⁹ = 3636929471309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3636929471821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3636929771821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32134710 + ... + 32247688.

It is an arithmetic number, because the mean of its divisors is an integer number (454810028400).

Almost surely, 2^{3636929471821} is an apocalyptic number.

It is an amenable number.

3636929471821 is a deficient number, since it is larger than the sum of its proper divisors (1550755379).

3636929471821 is a wasteful number, since it uses less digits than its factorization.

3636929471821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126419.

The product of its digits is 23514624, while the sum is 61.

The spelling of 3636929471821 in words is "three trillion, six hundred thirty-six billion, nine hundred twenty-nine million, four hundred seventy-one thousand, eight hundred twenty-one".