213549488640049 has 2 divisors, whose sum is σ = 213549488640050. Its totient is φ = 213549488640048.

The previous prime is 213549488639989. The next prime is 213549488640053. The reversal of 213549488640049 is 940046884945312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150621251656225 + 62928236983824 = 12272785^2 + 7932732^2 .

It is a cyclic number.

It is not a de Polignac number, because 213549488640049 - 2⁹ = 213549488639537 is a prime.

It is not a weakly prime, because it can be changed into another prime (213549488640949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106774744320024 + 106774744320025.

It is an arithmetic number, because the mean of its divisors is an integer number (106774744320025).

Almost surely, 2^{213549488640049} is an apocalyptic number.

It is an amenable number.

213549488640049 is a deficient number, since it is larger than the sum of its proper divisors (1).

213549488640049 is an equidigital number, since it uses as much as digits as its factorization.

213549488640049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238878720, while the sum is 67.

The spelling of 213549488640049 in words is "two hundred thirteen trillion, five hundred forty-nine billion, four hundred eighty-eight million, six hundred forty thousand, forty-nine".