291650313641 has 2 divisors, whose sum is σ = 291650313642. Its totient is φ = 291650313640.

The previous prime is 291650313631. The next prime is 291650313667. The reversal of 291650313641 is 146313056192.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165746694400 + 125903619241 = 407120^2 + 354829^2 .

It is a cyclic number.

It is not a de Polignac number, because 291650313641 - 2¹⁰ = 291650312617 is a prime.

It is not a weakly prime, because it can be changed into another prime (291650313631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145825156820 + 145825156821.

It is an arithmetic number, because the mean of its divisors is an integer number (145825156821).

Almost surely, 2^291650313641 is an apocalyptic number.

It is an amenable number.

291650313641 is a deficient number, since it is larger than the sum of its proper divisors (1).

291650313641 is an equidigital number, since it uses as much as digits as its factorization.

291650313641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 291650313641 in words is "two hundred ninety-one billion, six hundred fifty million, three hundred thirteen thousand, six hundred forty-one".