219705670057 has 2 divisors, whose sum is σ = 219705670058. Its totient is φ = 219705670056.

The previous prime is 219705670027. The next prime is 219705670141. The reversal of 219705670057 is 750076507912.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120870256896 + 98835413161 = 347664^2 + 314381^2 .

It is a cyclic number.

It is not a de Polignac number, because 219705670057 - 2²⁷ = 219571452329 is a prime.

It is not a weakly prime, because it can be changed into another prime (219705670027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109852835028 + 109852835029.

It is an arithmetic number, because the mean of its divisors is an integer number (109852835029).

Almost surely, 2^219705670057 is an apocalyptic number.

It is an amenable number.

219705670057 is a deficient number, since it is larger than the sum of its proper divisors (1).

219705670057 is an equidigital number, since it uses as much as digits as its factorization.

219705670057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 926100, while the sum is 49.

The spelling of 219705670057 in words is "two hundred nineteen billion, seven hundred five million, six hundred seventy thousand, fifty-seven".