191009780107 has 2 divisors, whose sum is σ = 191009780108. Its totient is φ = 191009780106.

The previous prime is 191009780083. The next prime is 191009780153. The reversal of 191009780107 is 701087900191.

191009780107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191009780107 - 2⁷ = 191009779979 is a prime.

It is not a weakly prime, because it can be changed into another prime (191009780177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95504890053 + 95504890054.

It is an arithmetic number, because the mean of its divisors is an integer number (95504890054).

Almost surely, 2^191009780107 is an apocalyptic number.

191009780107 is a deficient number, since it is larger than the sum of its proper divisors (1).

191009780107 is an equidigital number, since it uses as much as digits as its factorization.

191009780107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 43.

The spelling of 191009780107 in words is "one hundred ninety-one billion, nine million, seven hundred eighty thousand, one hundred seven".