291472484161 has 4 divisors (see below), whose sum is σ = 291544474500. Its totient is φ = 291400493824.

The previous prime is 291472484099. The next prime is 291472484179. The reversal of 291472484161 is 161484274192.

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 76228449025 + 215244035136 = 276095^2 + 463944^2 .

It is a cyclic number.

It is not a de Polignac number, because 291472484161 - 2¹⁷ = 291472353089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291472488161) 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, 35989096 + ... + 35997193.

It is an arithmetic number, because the mean of its divisors is an integer number (72886118625).

Almost surely, 2^291472484161 is an apocalyptic number.

It is an amenable number.

291472484161 is a deficient number, since it is larger than the sum of its proper divisors (71990339).

291472484161 is an equidigital number, since it uses as much as digits as its factorization.

291472484161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71990338.

The product of its digits is 774144, while the sum is 49.

The spelling of 291472484161 in words is "two hundred ninety-one billion, four hundred seventy-two million, four hundred eighty-four thousand, one hundred sixty-one".