221655642062752 has 12 divisors (see below), whose sum is σ = 436384545311106. Its totient is φ = 110827821031360.

The previous prime is 221655642062747. The next prime is 221655642062773. The reversal of 221655642062752 is 257260246556122.

It can be written as a sum of positive squares in only one way, i.e., 203245055011216 + 18410587051536 = 14256404^2 + 4290756^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221655642062693 and 221655642062702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3463369407199 + ... + 3463369407262.

Almost surely, 2^{221655642062752} is an apocalyptic number.

It is an amenable number.

221655642062752 is a deficient number, since it is larger than the sum of its proper divisors (214728903248354).

221655642062752 is an equidigital number, since it uses as much as digits as its factorization.

221655642062752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6926738814471 (or 6926738814463 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 55.

The spelling of 221655642062752 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, six hundred forty-two million, sixty-two thousand, seven hundred fifty-two".