291745494461 has 2 divisors, whose sum is σ = 291745494462. Its totient is φ = 291745494460.

The previous prime is 291745494419. The next prime is 291745494511. The reversal of 291745494461 is 164494547192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273576072025 + 18169422436 = 523045^2 + 134794^2 .

It is a cyclic number.

It is not a de Polignac number, because 291745494461 - 2¹⁰ = 291745493437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 291745494397 and 291745494406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291745494401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145872747230 + 145872747231.

It is an arithmetic number, because the mean of its divisors is an integer number (145872747231).

Almost surely, 2^291745494461 is an apocalyptic number.

It is an amenable number.

291745494461 is a deficient number, since it is larger than the sum of its proper divisors (1).

291745494461 is an equidigital number, since it uses as much as digits as its factorization.

291745494461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 56.

The spelling of 291745494461 in words is "two hundred ninety-one billion, seven hundred forty-five million, four hundred ninety-four thousand, four hundred sixty-one".