191480811 has 16 divisors (see below), whose sum is σ = 259494144. Its totient is φ = 125577504.

The previous prime is 191480797. The next prime is 191480833. The reversal of 191480811 is 118084191.

It is not a de Polignac number, because 191480811 - 2¹⁸ = 191218667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191480851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46540 + ... + 50486.

It is an arithmetic number, because the mean of its divisors is an integer number (16218384).

Almost surely, 2^191480811 is an apocalyptic number.

191480811 is a deficient number, since it is larger than the sum of its proper divisors (68013333).

191480811 is a wasteful number, since it uses less digits than its factorization.

191480811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210.

The product of its (nonzero) digits is 2304, while the sum is 33.

The square root of 191480811 is about 13837.6591589763. The cubic root of 191480811 is about 576.3793586273.

It can be divided in two parts, 191480 and 811, that added together give a palindrome (192291).

The spelling of 191480811 in words is "one hundred ninety-one million, four hundred eighty thousand, eight hundred eleven".