8169219041 has 4 divisors (see below), whose sum is σ = 8253437892. Its totient is φ = 8085000192.

The previous prime is 8169219017. The next prime is 8169219053. The reversal of 8169219041 is 1409129618.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4029583441 + 4139635600 = 63479^2 + 64340^2 .

It is a cyclic number.

It is not a de Polignac number, because 8169219041 - 2²² = 8165024737 is a prime.

It is a super-2 number, since 2×8169219041² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8169219041.

It is not an unprimeable number, because it can be changed into a prime (8166219041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42109280 + ... + 42109473.

It is an arithmetic number, because the mean of its divisors is an integer number (2063359473).

Almost surely, 2^8169219041 is an apocalyptic number.

It is an amenable number.

8169219041 is a deficient number, since it is larger than the sum of its proper divisors (84218851).

8169219041 is an equidigital number, since it uses as much as digits as its factorization.

8169219041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84218850.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 8169219041 is about 90383.7321701201. The cubic root of 8169219041 is about 2014.0033115538.

The spelling of 8169219041 in words is "eight billion, one hundred sixty-nine million, two hundred nineteen thousand, forty-one".