652728504221 has 2 divisors, whose sum is σ = 652728504222. Its totient is φ = 652728504220.

The previous prime is 652728504161. The next prime is 652728504277. The reversal of 652728504221 is 122405827256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476084820121 + 176643684100 = 689989^2 + 420290^2 .

It is a cyclic number.

It is not a de Polignac number, because 652728504221 - 2¹⁴ = 652728487837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652728501221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326364252110 + 326364252111.

It is an arithmetic number, because the mean of its divisors is an integer number (326364252111).

Almost surely, 2^652728504221 is an apocalyptic number.

It is an amenable number.

652728504221 is a deficient number, since it is larger than the sum of its proper divisors (1).

652728504221 is an equidigital number, since it uses as much as digits as its factorization.

652728504221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 652728504221 in words is "six hundred fifty-two billion, seven hundred twenty-eight million, five hundred four thousand, two hundred twenty-one".