205100670261457 has 2 divisors, whose sum is σ = 205100670261458. Its totient is φ = 205100670261456.

The previous prime is 205100670261379. The next prime is 205100670261479. The reversal of 205100670261457 is 754162076001502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186922052739136 + 18178617522321 = 13671944^2 + 4263639^2 .

It is a cyclic number.

It is not a de Polignac number, because 205100670261457 - 2⁷ = 205100670261329 is a prime.

It is not a weakly prime, because it can be changed into another prime (205100670261497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102550335130728 + 102550335130729.

It is an arithmetic number, because the mean of its divisors is an integer number (102550335130729).

Almost surely, 2^{205100670261457} is an apocalyptic number.

It is an amenable number.

205100670261457 is a deficient number, since it is larger than the sum of its proper divisors (1).

205100670261457 is an equidigital number, since it uses as much as digits as its factorization.

205100670261457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 205100670261457 in words is "two hundred five trillion, one hundred billion, six hundred seventy million, two hundred sixty-one thousand, four hundred fifty-seven".