221637564326072 has 64 divisors (see below), whose sum is σ = 434543175705600. Its totient is φ = 105779533749120.

The previous prime is 221637564326063. The next prime is 221637564326119. The reversal of 221637564326072 is 270623465736122.

It is a junction number, because it is equal to n+sod(n) for n = 221637564325999 and 221637564326017.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 798465947 + ... + 798743477.

It is an arithmetic number, because the mean of its divisors is an integer number (6789737120400).

Almost surely, 2^{221637564326072} is an apocalyptic number.

It is an amenable number.

221637564326072 is a deficient number, since it is larger than the sum of its proper divisors (212905611379528).

221637564326072 is a wasteful number, since it uses less digits than its factorization.

221637564326072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286596 (or 286592 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 56.

The spelling of 221637564326072 in words is "two hundred twenty-one trillion, six hundred thirty-seven billion, five hundred sixty-four million, three hundred twenty-six thousand, seventy-two".