221655635642753 has 12 divisors (see below), whose sum is σ = 242347909340160. Its totient is φ = 202618743842736.

The previous prime is 221655635642677. The next prime is 221655635642803. The reversal of 221655635642753 is 357246536556122.

It is not a de Polignac number, because 221655635642753 - 2³⁰ = 221654561900929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221655635642053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6366836033 + ... + 6366870846.

It is an arithmetic number, because the mean of its divisors is an integer number (20195659111680).

Almost surely, 2^{221655635642753} is an apocalyptic number.

It is an amenable number.

221655635642753 is a deficient number, since it is larger than the sum of its proper divisors (20692273697407).

221655635642753 is a wasteful number, since it uses less digits than its factorization.

221655635642753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12733707008 (or 12733706995 counting only the distinct ones).

The product of its digits is 272160000, while the sum is 62.

The spelling of 221655635642753 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, six hundred thirty-five million, six hundred forty-two thousand, seven hundred fifty-three".