219670109957 has 2 divisors, whose sum is σ = 219670109958. Its totient is φ = 219670109956.

The previous prime is 219670109951. The next prime is 219670110029. The reversal of 219670109957 is 759901076912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211967239201 + 7702870756 = 460399^2 + 87766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219670109957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219670109951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109835054978 + 109835054979.

It is an arithmetic number, because the mean of its divisors is an integer number (109835054979).

Almost surely, 2^219670109957 is an apocalyptic number.

It is an amenable number.

219670109957 is a deficient number, since it is larger than the sum of its proper divisors (1).

219670109957 is an equidigital number, since it uses as much as digits as its factorization.

219670109957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2143260, while the sum is 56.

The spelling of 219670109957 in words is "two hundred nineteen billion, six hundred seventy million, one hundred nine thousand, nine hundred fifty-seven".