199171815483 has 4 divisors (see below), whose sum is σ = 265562420648. Its totient is φ = 132781210320.

The previous prime is 199171815481. The next prime is 199171815487. The reversal of 199171815483 is 384518171991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 384518171991 = 3 ⋅128172723997.

It is not a de Polignac number, because 199171815483 - 2¹ = 199171815481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199171815481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33195302578 + ... + 33195302583.

It is an arithmetic number, because the mean of its divisors is an integer number (66390605162).

Almost surely, 2^199171815483 is an apocalyptic number.

199171815483 is a deficient number, since it is larger than the sum of its proper divisors (66390605165).

199171815483 is an equidigital number, since it uses as much as digits as its factorization.

199171815483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66390605164.

The product of its digits is 2177280, while the sum is 57.

The spelling of 199171815483 in words is "one hundred ninety-nine billion, one hundred seventy-one million, eight hundred fifteen thousand, four hundred eighty-three".