19091097389550 has 48 divisors (see below), whose sum is σ = 49837812140160. Its totient is φ = 4823014076640.

The previous prime is 19091097389489. The next prime is 19091097389591. The reversal of 19091097389550 is 5598379019091.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3349312482 + ... + 3349318181.

It is an arithmetic number, because the mean of its divisors is an integer number (1038287752920).

Almost surely, 2^{19091097389550} is an apocalyptic number.

19091097389550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19091097389550 is an abundant number, since it is smaller than the sum of its proper divisors (30746714750610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19091097389550 is a wasteful number, since it uses less digits than its factorization.

19091097389550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6698630697 (or 6698630692 counting only the distinct ones).

The product of its (nonzero) digits is 27556200, while the sum is 66.

The spelling of 19091097389550 in words is "nineteen trillion, ninety-one billion, ninety-seven million, three hundred eighty-nine thousand, five hundred fifty".