190811480857 has 4 divisors (see below), whose sum is σ = 195248957200. Its totient is φ = 186374004516.

The previous prime is 190811480819. The next prime is 190811480941. The reversal of 190811480857 is 758084118091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 758084118091 = 122231 ⋅6202061.

It is a cyclic number.

It is not a de Polignac number, because 190811480857 - 2⁷ = 190811480729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190811460857) 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, 2218738107 + ... + 2218738192.

It is an arithmetic number, because the mean of its divisors is an integer number (48812239300).

Almost surely, 2^190811480857 is an apocalyptic number.

It is an amenable number.

190811480857 is a deficient number, since it is larger than the sum of its proper divisors (4437476343).

190811480857 is an equidigital number, since it uses as much as digits as its factorization.

190811480857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437476342.

The product of its (nonzero) digits is 645120, while the sum is 52.

The spelling of 190811480857 in words is "one hundred ninety billion, eight hundred eleven million, four hundred eighty thousand, eight hundred fifty-seven".