291042064481 has 6 divisors (see below), whose sum is σ = 338559136290. Its totient is φ = 249464626656.

The previous prime is 291042064441. The next prime is 291042064493. The reversal of 291042064481 is 184460240192.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 287037706081 + 4004358400 = 535759^2 + 63280^2 .

It is a de Polignac number, because none of the positive numbers 2^k-291042064481 is a prime.

It is a super-2 number, since 2×291042064481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291042064441) 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 5 ways as a sum of consecutive naturals, for example, 2969816936 + ... + 2969817033.

It is an arithmetic number, because the mean of its divisors is an integer number (56426522715).

Almost surely, 2^291042064481 is an apocalyptic number.

It is an amenable number.

291042064481 is a deficient number, since it is larger than the sum of its proper divisors (47517071809).

291042064481 is an equidigital number, since it uses as much as digits as its factorization.

291042064481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5939633983 (or 5939633976 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 291042064481 in words is "two hundred ninety-one billion, forty-two million, sixty-four thousand, four hundred eighty-one".