19091097389549 has 16 divisors (see below), whose sum is σ = 20222933076288. Its totient is φ = 17960244671232.

The previous prime is 19091097389489. The next prime is 19091097389591. The reversal of 19091097389549 is 94598379019091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19091097389549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19091097389149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393095942 + ... + 393144504.

It is an arithmetic number, because the mean of its divisors is an integer number (1263933317268).

Almost surely, 2^{19091097389549} is an apocalyptic number.

It is an amenable number.

19091097389549 is a deficient number, since it is larger than the sum of its proper divisors (1131835686739).

19091097389549 is a wasteful number, since it uses less digits than its factorization.

19091097389549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58204.

The product of its (nonzero) digits is 198404640, while the sum is 74.

The spelling of 19091097389549 in words is "nineteen trillion, ninety-one billion, ninety-seven million, three hundred eighty-nine thousand, five hundred forty-nine".