191130553589 has 2 divisors, whose sum is σ = 191130553590. Its totient is φ = 191130553588.

The previous prime is 191130553441. The next prime is 191130553651. The reversal of 191130553589 is 985355031191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105603551089 + 85527002500 = 324967^2 + 292450^2 .

It is a cyclic number.

It is not a de Polignac number, because 191130553589 - 2²⁰ = 191129505013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191130552589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95565276794 + 95565276795.

It is an arithmetic number, because the mean of its divisors is an integer number (95565276795).

Almost surely, 2^191130553589 is an apocalyptic number.

It is an amenable number.

191130553589 is a deficient number, since it is larger than the sum of its proper divisors (1).

191130553589 is an equidigital number, since it uses as much as digits as its factorization.

191130553589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729000, while the sum is 50.

The spelling of 191130553589 in words is "one hundred ninety-one billion, one hundred thirty million, five hundred fifty-three thousand, five hundred eighty-nine".