19091097389591 has 2 divisors, whose sum is σ = 19091097389592. Its totient is φ = 19091097389590.

The previous prime is 19091097389489. The next prime is 19091097389603. The reversal of 19091097389591 is 19598379019091.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19091097389591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19091099389591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9545548694795 + 9545548694796.

It is an arithmetic number, because the mean of its divisors is an integer number (9545548694796).

Almost surely, 2^{19091097389591} is an apocalyptic number.

19091097389591 is a deficient number, since it is larger than the sum of its proper divisors (1).

19091097389591 is an equidigital number, since it uses as much as digits as its factorization.

19091097389591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49601160, while the sum is 71.

The spelling of 19091097389591 in words is "nineteen trillion, ninety-one billion, ninety-seven million, three hundred eighty-nine thousand, five hundred ninety-one".