591125750861 has 2 divisors, whose sum is σ = 591125750862. Its totient is φ = 591125750860.

The previous prime is 591125750851. The next prime is 591125750863. The reversal of 591125750861 is 168057521195.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 584200348900 + 6925401961 = 764330^2 + 83219^2 .

It is a cyclic number.

It is not a de Polignac number, because 591125750861 - 2⁶ = 591125750797 is a prime.

Together with 591125750863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (591125750863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295562875430 + 295562875431.

It is an arithmetic number, because the mean of its divisors is an integer number (295562875431).

Almost surely, 2^591125750861 is an apocalyptic number.

It is an amenable number.

591125750861 is a deficient number, since it is larger than the sum of its proper divisors (1).

591125750861 is an equidigital number, since it uses as much as digits as its factorization.

591125750861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 50.

The spelling of 591125750861 in words is "five hundred ninety-one billion, one hundred twenty-five million, seven hundred fifty thousand, eight hundred sixty-one".