19106117155 has 4 divisors (see below), whose sum is σ = 22927340592. Its totient is φ = 15284893720.

The previous prime is 19106117141. The next prime is 19106117167. The reversal of 19106117155 is 55171160191.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19106117155 - 2⁵ = 19106117123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910611711 + ... + 1910611720.

It is an arithmetic number, because the mean of its divisors is an integer number (5731835148).

Almost surely, 2^19106117155 is an apocalyptic number.

19106117155 is a deficient number, since it is larger than the sum of its proper divisors (3821223437).

19106117155 is an equidigital number, since it uses as much as digits as its factorization.

19106117155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821223436.

The product of its (nonzero) digits is 9450, while the sum is 37.

The spelling of 19106117155 in words is "nineteen billion, one hundred six million, one hundred seventeen thousand, one hundred fifty-five".